cc: Add an integration test for what scale we draw with after pinching

cc/test/layer_tree_test.h

 // 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.
 
 #ifndef CC_TEST_LAYER_TREE_TEST_H_
 #define CC_TEST_LAYER_TREE_TEST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "cc/animation/animation_delegate.h"
@@ skipping 34 matching lines @@
   virtual void InitializedRendererOnThread(LayerTreeHostImpl* host_impl,
                                            bool success) {}
   virtual DrawResult PrepareToDrawOnThread(
       LayerTreeHostImpl* host_impl,
       LayerTreeHostImpl::FrameData* frame_data,
       DrawResult draw_result);
   virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) {}
   virtual void SwapBuffersCompleteOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void UpdateVisibleTilesOnThread(LayerTreeHostImpl* host_impl) {}
+  virtual void NotifyTileStateChangedOnThread(LayerTreeHostImpl* host_impl,
+                                              const Tile* tile) {}
   virtual void AnimateLayers(LayerTreeHostImpl* host_impl,
                              base::TimeTicks monotonic_time) {}
   virtual void UpdateAnimationState(LayerTreeHostImpl* host_impl,
                                     bool has_unfinished_animation) {}
   virtual void WillAnimateLayers(LayerTreeHostImpl* host_impl,
                                  base::TimeTicks monotonic_time) {}
   virtual void ApplyViewportDeltas(const gfx::Vector2d& inner_delta,
                                    const gfx::Vector2d& outer_delta,
                                    float scale,
                                    float top_controls_delta) {}
@@ skipping 255 matching lines @@
   SINGLE_AND_MULTI_THREAD_DIRECT_RENDERER_TEST_F(TEST_FIXTURE_NAME); \
   SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(TEST_FIXTURE_NAME)
 
 // Some tests want to control when notify ready for activation occurs,
 // but this is not supported in the single-threaded case.
 #define SINGLE_AND_MULTI_THREAD_BLOCKNOTIFY_TEST_F(TEST_FIXTURE_NAME) \
   SINGLE_THREAD_NOIMPL_TEST_F(TEST_FIXTURE_NAME);                     \
   MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME)
 
 #endif  // CC_TEST_LAYER_TREE_TEST_H_