ui: Add debug flag to show composited layer borders in ChromeOS UI.

cc/layers/layer_impl.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/layers/layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 170 matching lines @@
   DCHECK_EQ(DRAW_MODE_NONE, current_draw_mode_);
   current_draw_mode_ = draw_mode;
   return true;
 }
 
 void LayerImpl::DidDraw(ResourceProvider* resource_provider) {
   DCHECK_NE(DRAW_MODE_NONE, current_draw_mode_);
   current_draw_mode_ = DRAW_MODE_NONE;
 }
 
-bool LayerImpl::ShowDebugBorders() const {
-  return layer_tree_impl()->debug_state().show_debug_borders;
+bool LayerImpl::ShowDebugBorders(DebugBorderType type) const {
+  return layer_tree_impl()->debug_state().show_debug_borders.test(type);
 }
 
 void LayerImpl::GetDebugBorderProperties(SkColor* color, float* width) const {
   float device_scale_factor =
       layer_tree_impl() ? layer_tree_impl()->device_scale_factor() : 1;
 
   if (draws_content_) {
     *color = DebugColors::ContentLayerBorderColor();
     *width = DebugColors::ContentLayerBorderWidth(device_scale_factor);
     return;
@@ skipping 20 matching lines @@
   AppendDebugBorderQuad(render_pass, bounds, shared_quad_state,
                         append_quads_data, color, width);
 }
 
 void LayerImpl::AppendDebugBorderQuad(RenderPass* render_pass,
                                       const gfx::Size& bounds,
                                       const SharedQuadState* shared_quad_state,
                                       AppendQuadsData* append_quads_data,
                                       SkColor color,
                                       float width) const {
-  if (!ShowDebugBorders())
+  if (!ShowDebugBorders(DebugBorderType::LAYER))
     return;
 
   gfx::Rect quad_rect(bounds);
   gfx::Rect visible_quad_rect(quad_rect);
   DebugBorderDrawQuad* debug_border_quad =
       render_pass->CreateAndAppendDrawQuad<DebugBorderDrawQuad>();
   debug_border_quad->SetNew(
       shared_quad_state, quad_rect, visible_quad_rect, color, width);
   if (contents_opaque()) {
     // When opaque, draw a second inner border that is thicker than the outer
@@ skipping 732 matching lines @@
 
 ScrollTree& LayerImpl::GetScrollTree() const {
   return GetPropertyTrees()->scroll_tree;
 }
 
 TransformTree& LayerImpl::GetTransformTree() const {
   return GetPropertyTrees()->transform_tree;
 }
 
 }  // namespace cc