cc: Add scheduler support for invalidating content on impl thread.

cc/scheduler/scheduler_state_machine_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/scheduler_state_machine.h"
 
 #include <stddef.h>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/scheduler/scheduler.h"
@@ skipping 182 matching lines @@
       sm->WillBeginCompositorFrameSinkCreation();
       return;
 
     case SchedulerStateMachine::ACTION_PREPARE_TILES:
       sm->WillPrepareTiles();
       return;
 
     case SchedulerStateMachine::ACTION_INVALIDATE_COMPOSITOR_FRAME_SINK:
       sm->WillInvalidateCompositorFrameSink();
       return;
+
+    case SchedulerStateMachine::ACTION_RUN_IMPL_SIDE_INVALIDATION:
+      sm->WillRunImplSideInvalidation();
+      return;
   }
 }
 
 TEST(SchedulerStateMachineTest, BeginFrameNeeded) {
   SchedulerSettings default_scheduler_settings;
   StateMachine state(default_scheduler_settings);
   state.SetVisible(true);
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_BEGIN_COMPOSITOR_FRAME_SINK_CREATION);
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
@@ skipping 1903 matching lines @@
   // to release the CompositorFrameSink.
   state.NotifyBeginMainFrameStarted();
   state.BeginMainFrameAborted(
       CommitEarlyOutReason::ABORTED_COMPOSITOR_FRAME_SINK_LOST);
 
   // The scheduler should begin the CompositorFrameSink creation now.
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_BEGIN_COMPOSITOR_FRAME_SINK_CREATION);
 }
 
+TEST(SchedulerStateMachineTest, ImplSideInvalidations) {
+  SchedulerSettings settings;
+  StateMachine state(settings);
+  SET_UP_STATE(state);
+
+  // Set up request for the main frame and commit to create a pending tree.
+  state.SetNeedsBeginMainFrame();
+  state.OnBeginImplFrame();
+  state.OnBeginImplFrame();
+  EXPECT_ACTION_UPDATE_STATE(
+      SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME);
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  state.NotifyBeginMainFrameStarted();
+  state.NotifyReadyToCommit();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_COMMIT);
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  // Request an impl-side invalidation after the commit. The request should wait
+  // till the current pending tree is activated.
+  state.SetNeedsImplSideInvalidation();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
+
+  // Activate the pending tree.
+  state.NotifyReadyToActivate();
+  EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_ACTIVATE_SYNC_TREE);
+
+  // Since there is no main frame request, activating the pending tree should
+  // run impl-side invalidations.
+  EXPECT_ACTION_UPDATE_STATE(
+      SchedulerStateMachine::ACTION_RUN_IMPL_SIDE_INVALIDATION);
+
+  // Request a main frame, followed by another impl-side invalidation request.
+}
+
 }  // namespace
 }  // namespace cc