Removed QuadSink and MockQuadCuller

cc/test/mock_occlusion_tracker.h

Index: cc/test/mock_occlusion_tracker.h
diff --git a/cc/test/mock_occlusion_tracker.h b/cc/test/mock_occlusion_tracker.h
index d46f5b7923af141cec0e61b8a269387273348180..4624a5627e8e38b20e70300cfb6c42417e1c6d00 100644
--- a/cc/test/mock_occlusion_tracker.h
+++ b/cc/test/mock_occlusion_tracker.h
@@ -10,7 +10,7 @@
 namespace cc {
 
 template <typename LayerType>
-class MockOcclusionTracker : public OcclusionTracker<LayerType> {
+class CC_EXPORT MockOcclusionTracker : public OcclusionTracker<LayerType> {
   // This class is used for testing only. It fakes just enough information to
   // calculate unoccluded content rect and unoccluded contributing surface
   // content rect. It calls the helper function of occlusion tracker to avoid
@@ -42,7 +42,7 @@ class MockOcclusionTracker : public OcclusionTracker<LayerType> {
         .occlusion_from_inside_target = occluded;
   }
 
-  gfx::Rect UnoccludedContentRect(
+  virtual gfx::Rect UnoccludedContentRect(

[enne (OOO), 2014/05/30 21:37:43]

style nit: don't inline virtuals

Also, isn't this the same as the base version in OcclusionTracker at this point?
Can this be removed and unvirtualized?

[weiliangc, 2014/05/30 21:46:07]

In unittest the OcclusionTracker and LayerImpls aren't set up correctly so it
fails on the DCHECKs in OcclusionTracker.

I put all the actual calculation in a helper function. The normal
OcclusionTracker still DCHECKs, and MockOT just skips to calculation.

[enne (OOO), 2014/05/30 22:11:10]

Hmm, ok.  I'm always saddened by virtual-for-testing sorts of things from a
premature performance optimization standpoint.

How hard would it be to set up tests to not DCHECK?

       const LayerType* render_target,
       const gfx::Rect& content_rect,
       const gfx::Transform& draw_transform) const OVERRIDE {
@@ -50,13 +50,16 @@ class MockOcclusionTracker : public OcclusionTracker<LayerType> {
         render_target, content_rect, draw_transform);
   }
 
-  gfx::Rect UnoccludedContributingSurfaceContentRect(
+  virtual gfx::Rect UnoccludedContributingSurfaceContentRect(
       const LayerType* layer,
       const gfx::Rect& content_rect,
       const gfx::Transform& draw_transform) const OVERRIDE {
     return this->UnoccludedContributingSurfaceContentRectHelper(
         layer, content_rect, draw_transform);
   }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockOcclusionTracker);
 };
 
 }  // namespace cc