Update from https://crrev.com/316786

cc/debug/debug_rect_history.cc

Index: cc/debug/debug_rect_history.cc
diff --git a/cc/debug/debug_rect_history.cc b/cc/debug/debug_rect_history.cc
index a8c50306134a3e8990c3198cf24b470235990772..cde7765383f33ba59dccd77278663f9257d3976e 100644
--- a/cc/debug/debug_rect_history.cc
+++ b/cc/debug/debug_rect_history.cc
@@ -29,8 +29,6 @@ void DebugRectHistory::SaveDebugRectsForCurrentFrame(
     LayerImpl* root_layer,
     LayerImpl* hud_layer,
     const LayerImplList& render_surface_layer_list,
-    const std::vector<gfx::Rect>& occluding_screen_space_rects,
-    const std::vector<gfx::Rect>& non_occluding_screen_space_rects,
     const LayerTreeDebugState& debug_state) {
   // For now, clear all rects from previous frames. In the future we may want to
   // store all debug rects for a history of many frames.
@@ -60,12 +58,6 @@ void DebugRectHistory::SaveDebugRectsForCurrentFrame(
   if (debug_state.show_screen_space_rects)
     SaveScreenSpaceRects(render_surface_layer_list);
 
-  if (debug_state.show_occluding_rects)
-    SaveOccludingRects(occluding_screen_space_rects);
-
-  if (debug_state.show_non_occluding_rects)
-    SaveNonOccludingRects(non_occluding_screen_space_rects);
-
   if (debug_state.show_layer_animation_bounds_rects)
     SaveLayerAnimationBoundsRects(render_surface_layer_list);
 }
@@ -170,20 +162,6 @@ void DebugRectHistory::SaveScreenSpaceRects(
   }
 }
 
-void DebugRectHistory::SaveOccludingRects(
-    const std::vector<gfx::Rect>& occluding_rects) {
-  for (size_t i = 0; i < occluding_rects.size(); ++i)
-    debug_rects_.push_back(DebugRect(OCCLUDING_RECT_TYPE, occluding_rects[i]));
-}
-
-void DebugRectHistory::SaveNonOccludingRects(
-    const std::vector<gfx::Rect>& non_occluding_rects) {
-  for (size_t i = 0; i < non_occluding_rects.size(); ++i) {
-    debug_rects_.push_back(
-        DebugRect(NONOCCLUDING_RECT_TYPE, non_occluding_rects[i]));
-  }
-}
-
 void DebugRectHistory::SaveTouchEventHandlerRects(LayerImpl* layer) {
   LayerTreeHostCommon::CallFunctionForSubtree<LayerImpl>(
       layer,