Cancel GPU acceleration for 2D canvas when drawing very large images

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.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 4485 matching lines @@
         return;
     TexImageFunctionType functionType;
     if (functionID == TexImage2D)
         functionType = TexImage;
     else
         functionType = TexSubImage;
     if (!validateTexFunc(funcName, functionType, SourceImageBitmap, target, level, internalformat, bitmap->width(), bitmap->height(), 1, 0, format, type, xoffset, yoffset, zoffset))
         return;
     ASSERT(bitmap->bitmapImage());
 
-    if (functionID != TexSubImage3D && bitmap->isTextureBacked() && canUseTexImageByGPU(functionID, internalformat, type)) {
+    if (functionID != TexSubImage3D && bitmap->isAccelerated() && canUseTexImageByGPU(functionID, internalformat, type)) {
         if (functionID == TexImage2D) {
             texImage2DBase(target, level, internalformat, bitmap->width(), bitmap->height(), 0, format, type, 0);
             texImageByGPU(TexImage2DByGPU, texture, target, level, internalformat, type, 0, 0, 0, bitmap);
         } else if (functionID == TexSubImage2D) {
             texImageByGPU(TexSubImage2DByGPU, texture, target, level, GL_RGBA, type, xoffset, yoffset, 0, bitmap);
         }
         return;
     }
     sk_sp<SkImage> skImage = bitmap->bitmapImage()->imageForCurrentFrame();
     SkPixmap pixmap;
@@ skipping 1956 matching lines @@
 
 void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(HTMLCanvasElementOrOffscreenCanvas& result) const
 {
     if (canvas())
         result.setHTMLCanvasElement(canvas());
     else
         result.setOffscreenCanvas(getOffscreenCanvas());
 }
 
 } // namespace blink