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..3926b8c21efef4cb0450439021e6b2f84d10eaa9 100644
--- a/ui/gl/scoped_binders.h
+++ b/ui/gl/scoped_binders.h
@@ -27,6 +27,17 @@ class GL_EXPORT ScopedFrameBufferBinder {
   DISALLOW_COPY_AND_ASSIGN(ScopedFrameBufferBinder);
 };
 
+class GL_EXPORT ScopedActiveTexture {
+ public:
+  ScopedActiveTexture(unsigned int texture);
+  ~ScopedActiveTexture();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int old_texture_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedActiveTexture);
+};
 
 class GL_EXPORT ScopedTextureBinder {
  public:
@@ -45,6 +56,55 @@ 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);
+};
+
+class GL_EXPORT ScopedViewport {
+ public:
+  ScopedViewport(int x, int y, int width, int height);
+  ~ScopedViewport();
+
+ private:
+  int data_[4] = {};
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedViewport);
+};
+
 }  // namespace gfx
 
 #endif  // UI_GL_SCOPED_BINDERS_H_