Fixing flakiness of TextureLayerChangeInvisibleMailboxTest

cc/test/layer_tree_test.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/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 261 matching lines @@
     if (block_impl_side_invalidation_) {
       impl_side_invalidation_was_blocked_ = true;
       return;
     }
 
     impl_side_invalidation_was_blocked_ = false;
     LayerTreeHostImpl::RequestImplSideInvalidation();
     test_hooks_->DidRequestImplSideInvalidation(this);
   }
 
+  void DidReceiveCompositorFrameAck() override {
+    test_hooks_->WillReceiveCompositorFrameAckOnThread(this);
+    LayerTreeHostImpl::DidReceiveCompositorFrameAck();
+    test_hooks_->DidReceiveCompositorFrameAckOnThread(this);
+  }
+
   AnimationHost* animation_host() const {
     return static_cast<AnimationHost*>(mutator_host());
   }
 
  private:
   TestHooks* test_hooks_;
   bool block_notify_ready_to_activate_for_testing_ = false;
   bool notify_ready_to_activate_was_blocked_ = false;
 
   bool block_impl_side_invalidation_ = false;
@@ skipping 599 matching lines @@
   DCHECK(task_runner_provider()->IsMainThread() ||
          task_runner_provider()->IsMainThreadBlocked());
   return layer_tree_host_.get();
 }
 
 Proxy* LayerTreeTest::proxy() {
   return layer_tree_host() ? layer_tree_host()->proxy() : NULL;
 }
 
 }  // namespace cc