Attach YUV420 to RGB converter to GLContext

ui/gl/gl_context.h

Index: ui/gl/gl_context.h
diff --git a/ui/gl/gl_context.h b/ui/gl/gl_context.h
index 87c3f8d76f0ca50698a791bc9dc7fc608eb34dcb..592a7beaba6301588cdd5babd35eedee80a9459d 100644
--- a/ui/gl/gl_context.h
+++ b/ui/gl/gl_context.h
@@ -17,6 +17,10 @@
 #include "ui/gl/gl_state_restorer.h"
 #include "ui/gl/gpu_preference.h"
 
+namespace gl {
+class YUVToRGBConverter;
+}  // namespace gl
+
 namespace gpu {
 class GLContextVirtual;
 }  // namespace gpu
@@ -29,7 +33,6 @@ class GPUTimingClient;
 class VirtualGLApi;
 struct GLVersionInfo;
 
-
 // Encapsulates an OpenGL context, hiding platform specific management.
 class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
  public:
@@ -127,6 +130,9 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   // Returns the GL renderer string. The context must be current.
   virtual std::string GetGLRenderer();
 
+  // Returns a helper structure to convert YUV textures to RGB textures.
+  virtual gl::YUVToRGBConverter* GetYUVToRGBConverter();
+
  protected:
   virtual ~GLContext();