Extract Scoped{FrameBuffer,Texture}Binder and clean up TFP in VAVDA.

content/common/gpu/gl_scoped_binders.h

+// 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.
+
+#ifndef CONTENT_COMMON_GPU_GL_SCOPED_BINDERS_H_
+#define CONTENT_COMMON_GPU_GL_SCOPED_BINDERS_H_
+
+namespace content {
+
+class ScopedFrameBufferBinder {
+ public:
+  explicit ScopedFrameBufferBinder(unsigned int fbo);
+  ~ScopedFrameBufferBinder();
+
+ private:
+  int old_fbo_;
+};
+
+class ScopedTextureBinder {
+ public:
+  explicit ScopedTextureBinder(unsigned int id);
+  ~ScopedTextureBinder();
+
+ private:
+  int old_id_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_GL_SCOPED_BINDERS_H_