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

cc/layers/layer_impl.h

 // Copyright 2011 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.
 
 #ifndef CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "cc/base/region.h"
 #include "cc/base/synced_property.h"
 #include "cc/cc_export.h"
+#include "cc/debug/layer_tree_debug_state.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/draw_properties.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/layers/layer_impl_test_properties.h"
 #include "cc/layers/layer_position_constraint.h"
 #include "cc/layers/performance_properties.h"
 #include "cc/layers/render_surface_impl.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/tiles/tile_priority.h"
@@ skipping 176 matching lines @@
     return use_local_transform_for_backface_visibility_;
   }
 
   void SetShouldCheckBackfaceVisibility(bool should_check_backface_visibility) {
     should_check_backface_visibility_ = should_check_backface_visibility;
   }
   bool should_check_backface_visibility() const {
     return should_check_backface_visibility_;
   }
 
-  bool ShowDebugBorders() const;
+  bool ShowDebugBorders(DebugBorderType type) const;
 
   // TODO(http://crbug.com/557160): Currently SPv2 creates dummy layers for the
   // sole purpose of representing a render surface. Once that dependency is
   // removed, also remove dummy layers from PaintArtifactCompositor.
   RenderSurfaceImpl* GetRenderSurface() const;
 
   // The render surface which this layer draws into. This can be either owned by
   // the same layer or an ancestor of this layer.
   RenderSurfaceImpl* render_target();
   const RenderSurfaceImpl* render_target() const;
@@ skipping 324 matching lines @@
   // the overlay scrollbars. It's set on the scroll layer (not the scrollbar
   // layers) and consumed by LayerTreeImpl::PushPropertiesTo during activation.
   bool needs_show_scrollbars_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_