[DL]: Rename isLocked to locked as per design principle.

As https://w3ctag.github.io/design-principles/#api-surface suggests,
boolean attributes should not have "is" at the beginning of their names.

This patch fixes this for DisplayLockContext.isLocked

R=chrishtr@chromium.org

Bug: 882663, github.com/WICG/display-locking/issues/43
Change-Id: Ie5be4b4f6fd0ee8656fbb3c31aae0e7eb0fc3612
Reviewed-on: https://chromium-review.googlesource.com/c/1466155
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: vmpstr <vmpstr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632467}

third_party/blink/renderer/core/display_lock/display_lock_context.idl

@@ -23,5 +23,5 @@ interface DisplayLockContext {
 
   // Returns true if this context is locked. In other words, if true, then any
   // changes to the subtree of this element would not be reflected visually on screen.
-  [ImplementedAs=IsLocked] readonly attribute boolean isLocked;
+  [ImplementedAs=IsLocked] readonly attribute boolean locked;
 };

third_party/blink/web_tests/display-lock/lock-after-append/is-locked-attribute.html → third_party/blink/web_tests/display-lock/lock-after-append/locked-attribute.html

@@ -15,32 +15,32 @@
 async_test((t) => {
   async function runTest() {
     let container = document.getElementById("container");
-    t.step(() => assert_false(container.displayLock.isLocked, "initial context is unlocked"));
+    t.step(() => assert_false(container.displayLock.locked, "initial context is unlocked"));
 
     let acquire_promise = container.displayLock.acquire({ timeout: Infinity });
-    t.step(() => assert_false(container.displayLock.isLocked, "context before acquire finishes is unlocked"));
+    t.step(() => assert_false(container.displayLock.locked, "context before acquire finishes is unlocked"));
 
     await acquire_promise;
-    t.step(() => assert_true(container.displayLock.isLocked, "context after acquire finishes is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context after acquire finishes is locked"));
 
     let update_promise = container.displayLock.update();
-    t.step(() => assert_true(container.displayLock.isLocked, "context during update is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context during update is locked"));
 
     await update_promise;
-    t.step(() => assert_true(container.displayLock.isLocked, "context after update is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context after update is locked"));
 
     let commit_promise = container.displayLock.commit();
-    t.step(() => assert_true(container.displayLock.isLocked, "context during commit is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context during commit is locked"));
 
     await commit_promise;
-    t.step(() => assert_false(container.displayLock.isLocked, "context after commit is unlocked"));
+    t.step(() => assert_false(container.displayLock.locked, "context after commit is unlocked"));
 
     t.done();
   }
 
   window.onload = function() {
     requestAnimationFrame(() => requestAnimationFrame(runTest));
   };
-}, "isLocked attribute");
+}, "locked attribute");
 </script>
 

third_party/blink/web_tests/display-lock/lock-before-append/is-locked-attribute.html → third_party/blink/web_tests/display-lock/lock-before-append/locked-attribute.html

@@ -16,34 +16,34 @@
   async function runTest() {
     let container = document.createElement("div");
     container.id = "container";
-    assert_false(container.displayLock.isLocked, "initial context is unlocked");
+    assert_false(container.displayLock.locked, "initial context is unlocked");
 
     let acquire_promise = container.displayLock.acquire({ timeout: Infinity });
-    t.step(() => assert_true(container.displayLock.isLocked, "context before acquire finishes is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context before acquire finishes is locked"));
 
     await acquire_promise;
-    t.step(() => assert_true(container.displayLock.isLocked, "context after acquire finishes is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context after acquire finishes is locked"));
 
     document.getElementById("parent").appendChild(container);
 
     let update_promise = container.displayLock.update();
-    t.step(() => assert_true(container.displayLock.isLocked, "context during update is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context during update is locked"));
 
     await update_promise;
-    t.step(() => assert_true(container.displayLock.isLocked, "context after update is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context after update is locked"));
 
     let commit_promise = container.displayLock.commit();
-    t.step(() => assert_true(container.displayLock.isLocked, "context during commit is locked"));
+    t.step(() => assert_true(container.displayLock.locked, "context during commit is locked"));
 
     await commit_promise;
-    t.step(() => assert_false(container.displayLock.isLocked, "context after commit is unlocked"));
+    t.step(() => assert_false(container.displayLock.locked, "context after commit is unlocked"));
 
     t.done();
   }
 
   window.onload = function() {
     requestAnimationFrame(() => requestAnimationFrame(runTest));
   };
-}, "isLocked attribute");
+}, "locked attribute");
 </script>