Initial skeleton of high-contrast mode.

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

 /*
  * Copyright (C) 2009 Apple Inc. 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 297 matching lines @@
         client_->ComputeInterestRect(this, previous_interest_rect_);
     interest_rect = &new_interest_rect;
   }
 
   if (!GetPaintController().SubsequenceCachingIsDisabled() &&
       !client_->NeedsRepaint(*this) && !GetPaintController().CacheIsEmpty() &&
       previous_interest_rect_ == *interest_rect) {
     return false;
   }
 
-  GraphicsContext context(GetPaintController(), disabled_mode, nullptr);
+  GraphicsContext context(GetPaintController(), nullptr, disabled_mode,
+                          nullptr);
 
   previous_interest_rect_ = *interest_rect;
   client_->PaintContents(this, context, painting_phase_, *interest_rect);
   return true;
 }
 
 void GraphicsLayer::UpdateChildList() {
   WebLayer* child_host = layer_->Layer();
   child_host->RemoveAllChildren();
 
@@ skipping 849 matching lines @@
 void GraphicsLayer::SetCompositorMutableProperties(uint32_t properties) {
   if (WebLayer* layer = PlatformLayer())
     layer->SetCompositorMutableProperties(properties);
 }
 
 sk_sp<PaintRecord> GraphicsLayer::CaptureRecord() {
   if (!DrawsContent())
     return nullptr;
 
   FloatRect bounds(IntRect(IntPoint(0, 0), ExpandedIntSize(Size())));
-  GraphicsContext graphics_context(GetPaintController(),
+  GraphicsContext graphics_context(GetPaintController(), nullptr,
                                    GraphicsContext::kNothingDisabled, nullptr);
   graphics_context.BeginRecording(bounds);
   GetPaintController().GetPaintArtifact().Replay(bounds, graphics_context);
   return graphics_context.EndRecording();
 }
 
 static bool PixelComponentsDiffer(int c1, int c2) {
   // Compare strictly for saturated values.
   if (c1 == 0 || c1 == 255 || c2 == 0 || c2 == 255)
     return c1 != c2;
@@ skipping 93 matching lines @@
 void showGraphicsLayerTree(const blink::GraphicsLayer* layer) {
   if (!layer) {
     LOG(INFO) << "Cannot showGraphicsLayerTree for (nil).";
     return;
   }
 
   String output = layer->LayerTreeAsText(blink::kLayerTreeIncludesDebugInfo);
   LOG(INFO) << output.Utf8().data();
 }
 #endif