cc: Remove OverdrawMetrics and --trace-overdraw flag.

cc/trees/quad_culler.cc

 // Copyright 2012 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.
 
 #include "cc/trees/quad_culler.h"
 
 #include "cc/debug/debug_colors.h"
-#include "cc/debug/overdraw_metrics.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/render_pass.h"
 #include "cc/trees/occlusion_tracker.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
@@ skipping 25 matching lines @@
     scoped_ptr<DrawQuad> draw_quad,
     const gfx::Rect& culled_rect,
     QuadList* quad_list,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
     const LayerImpl* layer,
     bool create_debug_border_quads) {
   bool keep_quad = !culled_rect.IsEmpty();
   if (keep_quad)
     draw_quad->visible_rect = culled_rect;
 
-  occlusion_tracker.overdraw_metrics()->DidCullForDrawing(
-      draw_quad->quadTransform(), draw_quad->rect, culled_rect);
-  gfx::Rect opaque_draw_rect =
-      draw_quad->opacity() == 1.0f ? draw_quad->opaque_rect : gfx::Rect();
-  occlusion_tracker.overdraw_metrics()->
-      DidDraw(draw_quad->quadTransform(), culled_rect, opaque_draw_rect);
-
   if (keep_quad) {
     if (create_debug_border_quads && !draw_quad->IsDebugQuad() &&
         draw_quad->visible_rect != draw_quad->rect) {
       SkColor color = DebugColors::CulledTileBorderColor();
       float width = DebugColors::CulledTileBorderWidth(
           layer ? layer->layer_tree_impl() : NULL);
       scoped_ptr<DebugBorderDrawQuad> debug_border_quad =
           DebugBorderDrawQuad::Create();
       debug_border_quad->SetNew(draw_quad->shared_quad_state,
                                 draw_quad->visible_rect,
@@ skipping 28 matching lines @@
 
   return AppendQuadInternal(draw_quad.Pass(),
                             culled_rect,
                             quad_list_,
                             occlusion_tracker_,
                             layer_,
                             show_culling_with_debug_border_quads_);
 }
 
 }  // namespace cc