cc: Send shared variables between main and impl side using the channel

cc/trees/threaded_channel_unittest.cc

 // Copyright 2014 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/threaded_channel.h"
 
 #include "cc/test/layer_tree_test.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 27 matching lines @@
   // LayerTreeTest.
   ThreadProxy* thread_proxy_;
   int calls_received_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ThreadedChannelTest);
 };
 
 class ThreadedChannelTestInitializationAndShutdown
     : public ThreadedChannelTest {
+  void InitializeImplOnImpl() override { calls_received_++; }
+
   void SetVisibleOnImpl(bool visible) override { calls_received_++; }
 
   void ReceivedRequestNewOutputSurface() override { calls_received_++; }
 
   void InitializeOutputSurfaceOnImpl(OutputSurface* output_surface) override {
     calls_received_++;
   }
 
   void ReceivedSetRendererCapabilitiesMainCopy(
       const RendererCapabilities& capabilities) override {
     calls_received_++;
   }
 
   void ReceivedDidInitializeOutputSurface(
       bool success,
       const RendererCapabilities& capabilities) override {
     calls_received_++;
     EndTest();
   }
 
+  void WillCloseLayerTreeHostOnImpl() override { calls_received_++; }
   void FinishGLOnImpl() override { calls_received_++; }
 
-  void AfterTest() override { EXPECT_EQ(6, calls_received_); }
+  void AfterTest() override { EXPECT_EQ(8, calls_received_); }
 };
 
 MULTI_THREAD_DIRECT_RENDERER_TEST_F(
     ThreadedChannelTestInitializationAndShutdown);
 
 class ThreadedChannelTestThrottleFrameProduction : public ThreadedChannelTest {
   void BeginChannelTest() override {
     proxy()->SetThrottleFrameProduction(true);
   }
 
@@ skipping 221 matching lines @@
     calls_received_++;
     EndTest();
   }
 
   void AfterTest() override { EXPECT_EQ(1, calls_received_); }
 };
 
 MULTI_THREAD_DIRECT_RENDERER_TEST_F(ThreadedChannelTestPageScaleAnimation);
 
 }  // namespace cc