cc: Move occlusion debug rects into the debug layer borders.

cc/trees/occlusion_tracker.h

Index: cc/trees/occlusion_tracker.h
diff --git a/cc/trees/occlusion_tracker.h b/cc/trees/occlusion_tracker.h
index b14baae3c1dfb25e02e8ad51f64fd23f66011b2f..ff6f18dda9c93ee55308a9632bf451c5edae43a3 100644
--- a/cc/trees/occlusion_tracker.h
+++ b/cc/trees/occlusion_tracker.h
@@ -57,16 +57,6 @@ class CC_EXPORT OcclusionTracker {
     minimum_tracking_size_ = size;
   }
 
-  // The following is used for visualization purposes.
-  void set_occluding_screen_space_rects_container(
-      std::vector<gfx::Rect>* rects) {
-    occluding_screen_space_rects_ = rects;
-  }
-  void set_non_occluding_screen_space_rects_container(
-      std::vector<gfx::Rect>* rects) {
-    non_occluding_screen_space_rects_ = rects;
-  }
-
  protected:
   struct StackObject {
     StackObject() : target(0) {}
@@ -115,10 +105,6 @@ class CC_EXPORT OcclusionTracker {
   gfx::Rect screen_space_clip_rect_;
   gfx::Size minimum_tracking_size_;
 
-  // This is used for visualizing the occlusion tracking process.
-  std::vector<gfx::Rect>* occluding_screen_space_rects_;
-  std::vector<gfx::Rect>* non_occluding_screen_space_rects_;
-
   DISALLOW_COPY_AND_ASSIGN(OcclusionTracker);
 };