Fixed bugs with Pepper 3D under dynamic GPU switching.

content/renderer/pepper_parent_context_provider.h

+// Copyright (c) 2011 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.
+
+#ifndef CONTENT_RENDERER_PEPPER_PARENT_CONTEXT_PROVIDER_H_
+#define CONTENT_RENDERER_PEPPER_PARENT_CONTEXT_PROVIDER_H_
+#pragma once
+
+#include "base/basictypes.h"
+
+class RendererGLContext;
+
+// Defines the mechanism by which a Pepper 3D context fetches its
+// parent context for display to the screen.
+class PepperParentContextProvider {
+ public:
+  virtual ~PepperParentContextProvider();
+  virtual RendererGLContext* GetParentContextForPlatformContext3D() = 0;
+
+ protected:
+  PepperParentContextProvider();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PepperParentContextProvider);
+};
+
+#endif  // CONTENT_RENDERER_PEPPER_PARENT_CONTEXT_PROVIDER_H_