browser plugin: Get the offscreen shared context from RenderThreadImpl

content/renderer/browser_plugin/browser_plugin_compositing_helper.cc

 // Copyright (c) 2013 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/renderer/browser_plugin/browser_plugin_compositing_helper.h"
 
+#include "cc/context_provider.h"
 #include "cc/solid_color_layer.h"
 #include "cc/texture_layer.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
 #include "content/renderer/browser_plugin/browser_plugin_manager.h"
 #include "content/renderer/render_thread_impl.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebSharedGraphicsContext3D.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
 #include "ui/gfx/size_conversions.h"
 #include "webkit/compositor_bindings/web_layer_impl.h"
 
 namespace content {
 
 BrowserPluginCompositingHelper::BrowserPluginCompositingHelper(
     WebKit::WebPluginContainer* container,
     BrowserPluginManager* manager,
     int instance_id,
@@ skipping 35 matching lines @@
 // To free the mailbox memory, we need a context to consume it
 // into a texture ID and then delete this texture ID.
 // We use a shared graphics context accessible from the main
 // thread to do it.
 void BrowserPluginCompositingHelper::FreeMailboxMemory(
     const std::string& mailbox_name,
     unsigned sync_point) {
   if (mailbox_name.empty())
     return;
 
-  WebKit::WebGraphicsContext3D *context =
-     WebKit::WebSharedGraphicsContext3D::mainThreadContext();
-  if (!context)
+  scoped_refptr<cc::ContextProvider> context_provider =
+      RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
+  if (!context_provider->InitializeOnMainThread())
     return;
+  if (!context_provider->BindToCurrentThread())
+    return;
+
+  WebKit::WebGraphicsContext3D *context = context_provider->Context3d();
   // When a buffer is released from the compositor, we also get a
   // sync point that specifies when in the command buffer
   // it's safe to use it again.
   // If the sync point is non-zero, we need to tell our context
   // to wait until this sync point is reached before we can safely
   // delete the buffer.
   if (sync_point)
     context->waitSyncPoint(sync_point);
 
   unsigned texture_id = context->createTexture();
@@ skipping 133 matching lines @@
                                                        callback));
   last_mailbox_valid_ = current_mailbox_valid;
 }
 
 void BrowserPluginCompositingHelper::UpdateVisibility(bool visible) {
   if (texture_layer_)
     texture_layer_->setIsDrawable(visible);
 }
 
 }  // namespace content