Address avoid redundant arguments lint.

packages/devtools_app/assets/scripts/inspector_polyfill_script.dart

@@ -114,7 +114,6 @@ String addServiceExtensions() {
             groupName: groupName,
             summaryTree: true,
             subtreeDepth: subtreeDepth,
-            includeProperties: false,
             service: instance,
             addAdditionalPropertiesCallback: (node, delegate) {
               final Map<String, Object> additionalJson = <String, Object>{};

packages/devtools_app/lib/src/debugger/flutter/breakpoints.dart

@@ -72,7 +72,6 @@ class _BreakpointPickerState extends State<BreakpointPicker> {
         child: Padding(
           padding: const EdgeInsets.all(borderPadding),
           child: Row(
-            crossAxisAlignment: CrossAxisAlignment.center,
             children: [
               Padding(
                 padding: const EdgeInsets.only(

packages/devtools_app/lib/src/debugger/flutter/scripts.dart

@@ -141,7 +141,6 @@ class ScriptPickerState extends State<ScriptPicker> {
         child: Container(
           padding: const EdgeInsets.all(densePadding),
           child: Row(
-            crossAxisAlignment: CrossAxisAlignment.center,
             children: [
               Icon(
                 icon,

packages/devtools_app/lib/src/flutter/connect_screen.dart

@@ -78,7 +78,6 @@ class _ConnectScreenBodyState extends State<ConnectScreenBody> {
     final CallbackDwell connectDebounce = CallbackDwell(_connect);
 
     return Row(
-      mainAxisAlignment: MainAxisAlignment.start,
       children: [
         SizedBox(
           width: 350.0,

packages/devtools_app/lib/src/flutter/notifications.dart

@@ -89,7 +89,6 @@ class NotificationsState extends State<_NotificationsProvider>
     if (_overlayEntry == null) {
       _overlayEntry = OverlayEntry(
         maintainState: true,
-        opaque: false,
         builder: _buildOverlay,
       );
       SchedulerBinding.instance.scheduleFrameCallback((_) {
@@ -142,7 +141,6 @@ class NotificationsState extends State<_NotificationsProvider>
           child: SingleChildScrollView(
             reverse: true,
             child: Column(
-              verticalDirection: VerticalDirection.down,
               mainAxisSize: MainAxisSize.min,
               children: _notifications,
             ),

packages/devtools_app/lib/src/flutter/tree.dart

@@ -106,7 +106,6 @@ class _TreeViewItemState<T extends TreeNode<T>> extends State<TreeViewItem<T>>
         padding: EdgeInsets.only(left: nodeIndent(widget.data)),
         child: Row(
             mainAxisSize: MainAxisSize.min,
-            crossAxisAlignment: CrossAxisAlignment.center,
             textBaseline: TextBaseline.alphabetic,
             children: [
               widget.data.isExpandable

packages/devtools_app/lib/src/http/_http_date.dart

@@ -270,7 +270,7 @@ class HttpDate {
       expect("GMT");
     }
     expectEnd();
-    return new DateTime.utc(year, month + 1, day, hours, minutes, seconds, 0);
+    return new DateTime.utc(year, month + 1, day, hours, minutes, seconds);
   }
 
   // Parse a cookie date string.
@@ -397,6 +397,6 @@ class HttpDate {
     if (minute > 59) error();
     if (second > 59) error();
 
-    return new DateTime.utc(year, month, dayOfMonth, hour, minute, second, 0);
+    return new DateTime.utc(year, month, dayOfMonth, hour, minute, second);
   }
 }

packages/devtools_app/lib/src/inspector/diagnostics_node.dart

@@ -382,7 +382,7 @@ class RemoteDiagnosticsNode extends DiagnosticableTree {
   Future<Map<String, InstanceRef>> get valueProperties async {
     if (_valueProperties == null) {
       if (propertyType == null || valueRef?.id == null) {
-        _valueProperties = Future.value(null);
+        _valueProperties = Future.value();
         return _valueProperties;
       }
       if (isEnumProperty()) {
@@ -401,7 +401,7 @@ class RemoteDiagnosticsNode extends DiagnosticableTree {
           propertyNames = ['codePoint'];
           break;
         default:
-          _valueProperties = Future.value(null);
+          _valueProperties = Future.value();
           return _valueProperties;
       }
       _valueProperties = (await inspectorService)

packages/devtools_app/lib/src/inspector/flutter/inspector_tree_flutter.dart

@@ -535,7 +535,6 @@ class InspectorRowContent extends StatelessWidget {
         child: ClipRect(
           child: Row(
             mainAxisSize: MainAxisSize.min,
-            crossAxisAlignment: CrossAxisAlignment.center,
             textBaseline: TextBaseline.alphabetic,
             children: [
               node.showExpandCollapse

packages/devtools_app/lib/src/inspector/flutter/layout_explorer/flex/arrow.dart

@@ -95,8 +95,6 @@ class ArrowWrapper extends StatelessWidget {
   Widget build(BuildContext context) {
     return Flex(
       direction: direction,
-      mainAxisSize: MainAxisSize.max,
-      mainAxisAlignment: MainAxisAlignment.start,
       children: <Widget>[
         Expanded(
           child: Container(

packages/devtools_app/lib/src/inspector/flutter/layout_explorer/flex/flex.dart

@@ -557,7 +557,6 @@ class _FlexLayoutExplorerWidgetState extends State<FlexLayoutExplorerWidget>
       decoration: BoxDecoration(
         border: Border.all(
           color: theme.primaryColorLight,
-          width: 1.0,
         ),
       ),
       margin: const EdgeInsets.only(top: margin, left: margin),
@@ -677,7 +676,6 @@ class _FlexLayoutExplorerWidgetState extends State<FlexLayoutExplorerWidget>
               for (var alignment in alignmentEnumEntries)
                 Row(
                   mainAxisAlignment: MainAxisAlignment.center,
-                  crossAxisAlignment: CrossAxisAlignment.center,
                   children: [
                     Expanded(
                       flex: 2,
@@ -709,7 +707,6 @@ class _FlexLayoutExplorerWidgetState extends State<FlexLayoutExplorerWidget>
                   padding: const EdgeInsets.symmetric(vertical: margin),
                   child: Row(
                     mainAxisAlignment: MainAxisAlignment.end,
-                    crossAxisAlignment: CrossAxisAlignment.center,
                     children: [
                       Expanded(
                         child: Text(
@@ -1024,7 +1021,6 @@ class FlexChildVisualizer extends StatelessWidget {
         left: margin,
       ),
       child: Column(
-        mainAxisAlignment: MainAxisAlignment.start,
         crossAxisAlignment: CrossAxisAlignment.end,
         children: [
           Flexible(

packages/devtools_app/lib/src/inspector/inspector_controller.dart

@@ -296,7 +296,7 @@ class InspectorController extends DisposableController
     if (!visibleToUser) {
       // We will refresh again once we are visible.
       // There is a risk a refresh got triggered before the view was visble.
-      return Future.value(null);
+      return Future.value();
     }
 
     // TODO(jacobr): refresh the tree as well as just the properties.
@@ -340,7 +340,7 @@ class InspectorController extends DisposableController
   Future<void> onForceRefresh() {
     assert(!_disposed);
     if (!visibleToUser || _disposed) {
-      return Future.value(null);
+      return Future.value();
     }
     recomputeTreeRoot(null, null, false);
 

packages/devtools_app/lib/src/inspector/inspector_service.dart

@@ -532,7 +532,7 @@ class ObjectGroup {
   Future<Object> _callServiceExtension(
       String extension, Map<String, Object> args) {
     if (disposed) {
-      return Future.value(null);
+      return Future.value();
     }
 
     return inspectorLibrary.addRequest(this, () async {
@@ -871,7 +871,7 @@ class ObjectGroup {
   Future<void> setSelectionInspector(
       InspectorInstanceRef selection, bool uiAlreadyUpdated) {
     if (disposed) {
-      return Future.value(null);
+      return Future.value();
     }
     inspectorService._trackClientSelfTriggeredSelection(selection);
     if (useDaemonApi) {
@@ -1032,7 +1032,7 @@ class InspectorObjectGroupManager {
     }
     if (_next == null) {
       // There is no pending update.
-      return Future.value(null);
+      return Future.value();
     }
 
     _pendingNext = Completer();

packages/devtools_app/lib/src/logging/flutter/logging_screen.dart

@@ -109,7 +109,6 @@ class _LoggingScreenState extends State<LoggingScreenBody>
   Widget build(BuildContext context) {
     return Column(children: [
       Row(
-        mainAxisAlignment: MainAxisAlignment.start,
         children: [
           clearButton(onPressed: _clearLogs),
           const Spacer(),

packages/devtools_app/lib/src/memory/flutter/memory_chart.dart

@@ -208,7 +208,6 @@ class MemoryChartState extends State<MemoryChart> with AutoDisposeMixin {
               ? const SizedBox()
               : Column(
                   mainAxisSize: MainAxisSize.min,
-                  mainAxisAlignment: MainAxisAlignment.start,
                   children: [
                     SizedBox(
                       height: defaultChartHeight,
@@ -279,15 +278,9 @@ class MemoryChartState extends State<MemoryChart> with AutoDisposeMixin {
           ..textSize = 2.0;
 */
       },
-      highLightPerTapEnabled: true,
       backgroundColor: chartBackgroundColor,
       doubleTapToZoomEnabled: false,
-      drawGridBackground: false,
-      dragXEnabled: true,
-      dragYEnabled: true,
       // TODO(terry): For now disable zoom with double-click.
-      scaleXEnabled: true,
-      scaleYEnabled: true,
       pinchZoomEnabled: false,
       description: desc,
       marker: _selectedDartChart,
@@ -349,11 +342,7 @@ class MemoryChartState extends State<MemoryChart> with AutoDisposeMixin {
           ..textSize = 2.0;
 */
       },
-      highLightPerTapEnabled: true,
       backgroundColor: chartBackgroundColor,
-      drawGridBackground: false,
-      dragXEnabled: true,
-      dragYEnabled: true,
       // TOD(terry): Disable zoom via double-click. Consider +/- button
       //             for a controlled zoom in/zoom out.
       scaleXEnabled: false,

packages/devtools_app/lib/src/memory/flutter/memory_filter.dart

@@ -326,7 +326,6 @@ class SnapshotFilterState extends State<SnapshotFilterDialog>
             child: Padding(
               padding: const EdgeInsets.only(left: 15),
               child: Column(
-                mainAxisAlignment: MainAxisAlignment.start,
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   Column(
@@ -338,28 +337,24 @@ class SnapshotFilterState extends State<SnapshotFilterDialog>
                             labelText: 'Filter Snapshot'),
                       ),
                       Row(
-                        mainAxisAlignment: MainAxisAlignment.start,
                         children: [
                           privateClasses,
                           const Text('Hide Private Class e.g.,_className'),
                         ],
                       ),
                       Row(
-                        mainAxisAlignment: MainAxisAlignment.start,
                         children: [
                           zeroInstances,
                           const Text('Hide Classes with No Instances'),
                         ],
                       ),
                       Row(
-                        mainAxisAlignment: MainAxisAlignment.start,
                         children: [
                           libraryNoInstances,
                           const Text('Hide Library with No Instances'),
                         ],
                       ),
                       Row(
-                        mainAxisAlignment: MainAxisAlignment.start,
                         children: [
                           const Padding(padding: EdgeInsets.only(top: 30)),
                           Text('Hide Libraries or Packages '

packages/devtools_app/lib/src/memory/flutter/memory_screen.dart

@@ -249,7 +249,6 @@ class MemoryBodyState extends State<MemoryBody> with AutoDisposeMixin {
       valueListenable: controller.paused,
       builder: (context, paused, _) {
         return Row(
-          crossAxisAlignment: CrossAxisAlignment.center,
           children: [
             OutlineButton(
               key: MemoryScreen.pauseButtonKey,
@@ -312,7 +311,6 @@ class MemoryBodyState extends State<MemoryBody> with AutoDisposeMixin {
 
   Widget _buildMemoryControls(TextTheme textTheme) {
     return Row(
-      crossAxisAlignment: CrossAxisAlignment.center,
       children: [
         _memorySourceDropdown(textTheme),
         const SizedBox(width: defaultSpacing),

packages/devtools_app/lib/src/timeline/flutter/timeline_screen.dart

@@ -365,7 +365,6 @@ class TimelineConfigurationsDialog extends StatelessWidget {
         padding: const EdgeInsets.all(defaultSpacing),
         child: Column(
           mainAxisSize: MainAxisSize.min,
-          mainAxisAlignment: MainAxisAlignment.start,
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             ...headerInColumn(theme.textTheme, 'Recorded Streams'),
@@ -428,7 +427,6 @@ class TimelineConfigurationsDialog extends StatelessWidget {
   }) {
     return Row(
       mainAxisSize: MainAxisSize.min,
-      mainAxisAlignment: MainAxisAlignment.start,
       children: [
         ValueListenableBuilder(
           valueListenable: listenable,

packages/devtools_app/lib/src/ui/flutter/dialog.dart

@@ -12,7 +12,7 @@ class DialogCancelButton extends StatelessWidget {
   Widget build(BuildContext context) {
     return FlatButton(
       onPressed: () {
-        Navigator.of(context, rootNavigator: false).pop(dialogDefault);
+        Navigator.of(context).pop(dialogDefault);
       },
       child: const Text('Cancel'),
     );
@@ -30,7 +30,7 @@ class DialogOkButton extends StatelessWidget {
     return FlatButton(
       onPressed: () {
         if (onOk != null) onOk();
-        Navigator.of(context, rootNavigator: false).pop(dialogDefault);
+        Navigator.of(context).pop(dialogDefault);
       },
       child: const Text('OK'),
     );

packages/devtools_app/lib/src/ui/icons.dart

@@ -248,6 +248,5 @@ Image createImageIcon(String url) {
     image: AssetImage(url),
     height: defaultIconSize,
     width: defaultIconSize,
-    color: null,
   );
 }

packages/devtools_app/test/flutter/extent_delegate_test.dart

@@ -195,7 +195,6 @@ void main() {
         extentDelegate: extentDelegate,
       );
       final RenderViewport root = RenderViewport(
-        axisDirection: AxisDirection.down,
         crossAxisDirection: AxisDirection.right,
         offset: ViewportOffset.zero(),
         cacheExtent: 0,

packages/devtools_app/test/http_request_data_table_source_test.dart

@@ -56,7 +56,7 @@ void main() {
       );
 
       expect(
-        dataTable.formatRequestTime(DateTime(2020, 1, 16, 13, 0, 0)),
+        dataTable.formatRequestTime(DateTime(2020, 1, 16, 13)),
         '13:00:00 1/16/2020',
       );
     });