Initial skeleton of high-contrast mode.

third_party/WebKit/Source/platform/graphics/GraphicsLayer.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 231 matching lines @@
   void SetScrollableArea(ScrollableArea*, bool is_visual_viewport);
   ScrollableArea* GetScrollableArea() const { return scrollable_area_; }
 
   WebContentLayer* ContentLayer() const { return layer_.get(); }
 
   static void RegisterContentsLayer(WebLayer*);
   static void UnregisterContentsLayer(WebLayer*);
 
   IntRect InterestRect();
   void Paint(const IntRect* interest_rect,
+             HighContrastSettings* = nullptr,
              GraphicsContext::DisabledMode = GraphicsContext::kNothingDisabled);
 
   // cc::LayerClient implementation.
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> TakeDebugInfo(
       cc::Layer*) override;
   void didUpdateMainThreadScrollingReasons() override;
   void didChangeScrollbarsHidden(bool);
 
   PaintController& GetPaintController();
 
@@ skipping 21 matching lines @@
 
   explicit GraphicsLayer(GraphicsLayerClient*);
   // for testing
   friend class CompositedLayerMappingTest;
   friend class PaintControllerPaintTestBase;
 
  private:
   // Returns true if PaintController::paintArtifact() changed and needs commit.
   bool PaintWithoutCommit(
       const IntRect* interest_rect,
+      HighContrastSettings* = nullptr,
       GraphicsContext::DisabledMode = GraphicsContext::kNothingDisabled);
 
   // Adds a child without calling updateChildList(), so that adding children
   // can be batched before updating.
   void AddChildInternal(GraphicsLayer*);
 
 #if DCHECK_IS_ON()
   bool HasAncestor(GraphicsLayer*) const;
 #endif
 
@@ skipping 92 matching lines @@
 };
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the blink namespace for ease of invocation from gdb.
 void PLATFORM_EXPORT showGraphicsLayerTree(const blink::GraphicsLayer*);
 #endif
 
 #endif  // GraphicsLayer_h