Disable Super G icon when Search Companion is not available on page

This required to things:
1. Using a different Super G icon that has padding built in (requested
   by UI)
2. When disabled, switch to a monochrome icon so the disabled theme
   can be applied.

https://screencast.googleplex.com/cast/NjU1NTU1NDk3ODcyNTg4OHwwNzI5YjBmNy1hMA

(cherry picked from commit b760749)

Bug: b:284980135
Change-Id: I7756d27ddee593b416d88138bcc8030e08e37955
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4581150
Reviewed-by: Caroline Rising <corising@chromium.org>
Commit-Queue: Duncan Mercer <mercerd@google.com>
Reviewed-by: Ali Stanfield <stanfield@google.com>
Cr-Original-Commit-Position: refs/heads/main@{#1153443}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4591038
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: Duncan Mercer <mercerd@google.com>
Cr-Commit-Position: refs/branch-heads/5790@{#406}
Cr-Branched-From: 1d71a33-refs/heads/main@{#1148114}

chrome/browser/ui/views/side_panel/search_companion/search_companion_side_panel_coordinator.cc

@@ -16,6 +16,7 @@
 #include "chrome/browser/ui/ui_features.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/side_panel/side_panel_entry.h"
+#include "chrome/browser/ui/views/side_panel/side_panel_registry.h"
 #include "chrome/browser/ui/views/side_panel/side_panel_toolbar_container.h"
 #include "chrome/browser/ui/views/toolbar/toolbar_view.h"
 #include "chrome/common/pref_names.h"
@@ -31,9 +32,11 @@ SearchCompanionSidePanelCoordinator::SearchCompanionSidePanelCoordinator(
       // TODO(b/269331995): Localize menu item label.
       name_(l10n_util::GetStringUTF16(IDS_SIDE_PANEL_COMPANION_TITLE)),
 #if BUILDFLAG(GOOGLE_CHROME_BRANDING)
-      icon_(vector_icons::kGoogleGLogoIcon),
+      icon_(vector_icons::kGoogleSuperGIcon),
+      disabled_icon_(vector_icons::kGoogleGLogoMonochromeIcon),
 #else
       icon_(vector_icons::kSearchIcon),
+      disabled_icon_(vector_icons::kSearchIcon),
 #endif
       pref_service_(browser->profile()->GetPrefs()) {
   if (auto* template_url_service =
@@ -113,15 +116,15 @@ void SearchCompanionSidePanelCoordinator::OnTabStripModelChanged(
     }
   }
   if (selection.active_tab_changed()) {
-    MaybeUpdatePinnedButtonEnabledState();
+    MaybeUpdateCompanionEnabledState();
   }
 }
 
 void SearchCompanionSidePanelCoordinator::TabChangedAt(
     content::WebContents* contents,
     int index,
     TabChangeType change_type) {
-  MaybeUpdatePinnedButtonEnabledState();
+  MaybeUpdateCompanionEnabledState();
 }
 
 void SearchCompanionSidePanelCoordinator::
@@ -175,19 +178,45 @@ void SearchCompanionSidePanelCoordinator::
   }
 }
 
-void SearchCompanionSidePanelCoordinator::
-    MaybeUpdatePinnedButtonEnabledState() {
+void SearchCompanionSidePanelCoordinator::MaybeUpdateCompanionEnabledState() {
+  bool enabled = companion::IsCompanionAvailableForCurrentActiveTab(browser_);
+  MaybeUpdatePinnedButtonEnabledState(enabled);
+  MaybeUpdateComboboxEntryEnabledState(enabled);
+}
+
+void SearchCompanionSidePanelCoordinator::MaybeUpdatePinnedButtonEnabledState(
+    bool enabled) {
   BrowserView* browser_view = BrowserView::GetBrowserViewForBrowser(browser_);
   if (!browser_view) {
     return;
   }
   SidePanelToolbarContainer* container =
       browser_view->toolbar()->side_panel_container();
   if (container && container->IsPinned(SidePanelEntry::Id::kSearchCompanion)) {
-    bool enabled = companion::IsCompanionAvailableForCurrentActiveTab(browser_);
-    container->GetPinnedButtonForId(SidePanelEntry::Id::kSearchCompanion)
-        .SetEnabled(enabled);
+    ToolbarButton& button =
+        container->GetPinnedButtonForId(SidePanelEntry::Id::kSearchCompanion);
+    button.SetEnabled(enabled);
+    button.SetVectorIcon(enabled ? icon() : disabled_icon());
+  }
+}
+
+void SearchCompanionSidePanelCoordinator::MaybeUpdateComboboxEntryEnabledState(
+    bool enabled) {
+  auto* registry = SidePanelRegistry::Get(
+      browser_->tab_strip_model()->GetActiveWebContents());
+  if (!registry) {
+    return;
+  }
+
+  auto* entry = registry->GetEntryForKey(
+      SidePanelEntry::Key(SidePanelEntry::Id::kSearchCompanion));
+  if (!entry) {
+    return;
   }
+
+  entry->ResetIcon(ui::ImageModel::FromVectorIcon(
+      (enabled ? icon() : disabled_icon()), ui::kColorIcon,
+      /*icon_size=*/16));
 }
 
 void SearchCompanionSidePanelCoordinator::OnTemplateURLServiceShuttingDown() {

chrome/browser/ui/views/side_panel/search_companion/search_companion_side_panel_coordinator.h

@@ -46,6 +46,7 @@ class SearchCompanionSidePanelCoordinator
 
   std::u16string name() const { return name_; }
   const gfx::VectorIcon& icon() { return *icon_; }
+  const gfx::VectorIcon& disabled_icon() { return *disabled_icon_; }
 
   // TabStripModelObserver:
   void OnTabStripModelChanged(
@@ -74,9 +75,15 @@ class SearchCompanionSidePanelCoordinator
   // Updates CSC availability in side panel.
   void UpdateCompanionAvailabilityInSidePanel();
 
+  // Update companion enabled state based on active tab's url.
+  void MaybeUpdateCompanionEnabledState();
+
   // Update whether the CSC pinned toolbar button is enabled if the button is
-  // pinned based on active tab's url.
-  void MaybeUpdatePinnedButtonEnabledState();
+  // pinned.
+  void MaybeUpdatePinnedButtonEnabledState(bool enabled);
+
+  // Update whether the CSC combobox entry is enabled if the entry exists.
+  void MaybeUpdateComboboxEntryEnabledState(bool enabled);
 
   // Called if there is a change in the state of policy pref.
   void OnPolicyPrefChanged();
@@ -87,6 +94,7 @@ class SearchCompanionSidePanelCoordinator
   raw_ptr<Browser> browser_;
   std::u16string name_;
   const raw_ref<const gfx::VectorIcon, ExperimentalAsh> icon_;
+  const raw_ref<const gfx::VectorIcon, ExperimentalAsh> disabled_icon_;
   raw_ptr<PrefService> pref_service_;
   bool dsp_is_google_ = false;
   bool csc_enabled_via_policy_ = false;