cc: Add checker-imaging support to TileManager.

cc/trees/layer_tree_host_impl_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/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 155 matching lines @@
   void OnDrawForCompositorFrameSink(bool resourceless_software_draw) override {
     std::unique_ptr<LayerTreeHostImpl::FrameData> frame(
         new LayerTreeHostImpl::FrameData);
     EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(frame.get()));
     last_on_draw_render_passes_.clear();
     RenderPass::CopyAll(frame->render_passes, &last_on_draw_render_passes_);
     host_impl_->DrawLayers(frame.get());
     host_impl_->DidDrawAllLayers(*frame);
     last_on_draw_frame_ = std::move(frame);
   }
+  void NeedsImplSideInvalidation() override {}
 
   void set_reduce_memory_result(bool reduce_memory_result) {
     reduce_memory_result_ = reduce_memory_result;
   }
 
   virtual bool CreateHostImpl(
       const LayerTreeSettings& settings,
       std::unique_ptr<CompositorFrameSink> compositor_frame_sink) {
     return CreateHostImplWithTaskRunnerProvider(
         settings, std::move(compositor_frame_sink), &task_runner_provider_);
@@ skipping 11530 matching lines @@
   SetupMouseMoveAtTestScrollbarStates(true);
 }
 
 TEST_F(LayerTreeHostImplTest,
        LayerTreeHostImplTestScrollbarStatesInNotMainThreadScorlling) {
   SetupMouseMoveAtTestScrollbarStates(false);
 }
 
 }  // namespace
 }  // namespace cc