gpu: Add YCbCr 420v extension.

ui/gl/scoped_binders.h

Index: ui/gl/scoped_binders.h
diff --git a/ui/gl/scoped_binders.h b/ui/gl/scoped_binders.h
index dab7b3155487d78547ba0447485b6a965cc62eae..1881628a2ccedb0a5dbc6a078b1c63be2981b293 100644
--- a/ui/gl/scoped_binders.h
+++ b/ui/gl/scoped_binders.h
@@ -45,6 +45,44 @@ class GL_EXPORT ScopedTextureBinder {
   DISALLOW_COPY_AND_ASSIGN(ScopedTextureBinder);
 };
 
+class GL_EXPORT ScopedUseProgram {
+ public:
+  ScopedUseProgram(unsigned int program);
+  ~ScopedUseProgram();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int old_program_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedUseProgram);
+};
+
+class GL_EXPORT ScopedEnableVertexAttribArray {
+ public:
+  ScopedEnableVertexAttribArray(unsigned int index);
+  ~ScopedEnableVertexAttribArray();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int enabled_;
+  int index_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedEnableVertexAttribArray);
+};
+
+class GL_EXPORT ScopedBufferBinder {
+ public:
+  ScopedBufferBinder(unsigned int target, unsigned int index);
+  ~ScopedBufferBinder();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int target_;
+  int old_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedBufferBinder);
+};
+
 }  // namespace gfx
 
 #endif  // UI_GL_SCOPED_BINDERS_H_