Remove the CCOcclusionTracker include from CCRenderPass header file

cc/CCRenderPass.h

Index: cc/CCRenderPass.h
diff --git a/cc/CCRenderPass.h b/cc/CCRenderPass.h
index 1a9ff59e0564c11516b70a46aeb98a41ffd463b3..cdfa958dd27ea0de44b19ec20780d5eb8e97a231 100644
--- a/cc/CCRenderPass.h
+++ b/cc/CCRenderPass.h
@@ -10,7 +10,6 @@
 #include "cc/scoped_ptr_hash_map.h"
 #include "cc/scoped_ptr_vector.h"
 #include "CCDrawQuad.h"
-#include "CCOcclusionTracker.h"
 #include "CCSharedQuadState.h"
 #include "FloatRect.h"
 #include "SkColor.h"
@@ -21,10 +20,14 @@
 namespace cc {
 
 class CCLayerImpl;
+template<typename LayerType, typename SurfaceType>
+class CCOcclusionTrackerBase;
 class CCRenderSurface;
 
 struct CCAppendQuadsData;
 
+typedef CCOcclusionTrackerBase<CCLayerImpl, CCRenderSurface> CCOcclusionTrackerImpl;
+
 // A list of CCDrawQuad objects, sorted internally in front-to-back order.
 class CCQuadList : public ScopedPtrVector<CCDrawQuad> {
 public: