Implement client side PBOs for glReadPixel

content/browser/renderer_host/image_transport_factory_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/image_transport_factory_android.h"
 
 #include "base/memory/singleton.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/renderer_host/compositor_impl_android.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
@@ skipping 143 matching lines @@
   if (!context_->makeContextCurrent()) {
     LOG(ERROR) << "Failed to make helper context current.";
     return;
   }
   context_->bindTexture(GL_TEXTURE_2D, texture_id);
   context_->produceTextureCHROMIUM(GL_TEXTURE_2D, mailbox_name);
 }
 
 GLHelper* CmdBufferImageTransportFactory::GetGLHelper() {
   if (!gl_helper_.get())
-    gl_helper_.reset(new GLHelper(GetContext3D(), NULL));
+    gl_helper_.reset(new GLHelper(GetContext3D()));
 
   return gl_helper_.get();
 }
 
 }  // anonymous namespace
 
 // static
 ImageTransportFactoryAndroid* ImageTransportFactoryAndroid::GetInstance() {
   if (!g_factory) {
     if (CompositorImpl::UsesDirectGL())
       g_factory = new DirectGLImageTransportFactory();
     else
       g_factory = new CmdBufferImageTransportFactory();
   }
 
   return g_factory;
 }
 
 ImageTransportFactoryAndroid::ImageTransportFactoryAndroid() {
 }
 
 ImageTransportFactoryAndroid::~ImageTransportFactoryAndroid() {
 }
 
 } // namespace content