Disable display list 2d canvas on low-end devices

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 847 matching lines @@
 bool HTMLCanvasElement::ShouldUseDisplayList() {
   // Rasterization of web contents will blend in the output space. Only embed
   // the canvas as a display list if it intended to do output space blending as
   // well.
   if (!context_->color_params().UsesOutputSpaceBlending())
     return false;
 
   if (RuntimeEnabledFeatures::forceDisplayList2dCanvasEnabled())
     return true;
 
+  if (MemoryCoordinator::IsLowEndDevice())
+    return false;
+
   if (!RuntimeEnabledFeatures::displayList2dCanvasEnabled())
     return false;
 
   return true;
 }
 
 std::unique_ptr<ImageBufferSurface>
 HTMLCanvasElement::CreateWebGLImageBufferSurface(OpacityMode opacity_mode) {
   DCHECK(Is3d());
   // If 3d, but the use of the canvas will be for non-accelerated content
@@ skipping 552 matching lines @@
     // Creates a placeholder layer first before Surface is created.
     surface_layer_bridge_->CreateSolidColorLayer();
   }
 }
 
 void HTMLCanvasElement::OnWebLayerReplaced() {
   SetNeedsCompositingUpdate();
 }
 
 }  // namespace blink