This CL adds client.toDataURL which gets the contents...

converter/cross/renderer_stub.cc

 /*
  * Copyright 2009, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 178 matching lines @@
     int width,
     int height) {
   return RenderDepthStencilSurface::Ref(
       new RenderDepthStencilSurfaceStub(service_locator(), width, height));
 }
 
 StreamBank::Ref RendererStub::CreateStreamBank() {
   return StreamBank::Ref(new StreamBankStub(service_locator()));
 }
 
-bool RendererStub::SaveScreen(const String &) {
-  DCHECK(false);
-  return true;
+Bitmap::Ref RendererStub::TakeScreenshot() {
+  return Bitmap::Ref();
 }
 
 ParamCache *RendererStub::CreatePlatformSpecificParamCache(void) {
   return new ParamCacheStub;
 }
 
 void RendererStub::SetViewportInPixels(int, int, int, int, float, float) {
   DCHECK(false);
 }
 
 const int* RendererStub::GetRGBAUByteNSwizzleTable() {
   static int swizzle_table[] = { 0, 1, 2, 3, };
   return swizzle_table;
 }
 
 // This is a factory function for creating Renderer objects.  Since
 // we're implementing a stub renderer, we only ever return a stub renderer.
 Renderer* Renderer::CreateDefaultRenderer(ServiceLocator* service_locator) {
   return RendererStub::CreateDefault(service_locator);
 }
 
 }  // namespace o3d