ui/gl: Move GLImage into gl namespace.

content/common/gpu/media/vaapi_picture.h

Index: content/common/gpu/media/vaapi_picture.h
diff --git a/content/common/gpu/media/vaapi_picture.h b/content/common/gpu/media/vaapi_picture.h
index ad43dfa3af303270cb0be47a8b1fbe09b662511c..c1fb4c5b789cc20bd7e7a2024814a2f0f8265f28 100644
--- a/content/common/gpu/media/vaapi_picture.h
+++ b/content/common/gpu/media/vaapi_picture.h
@@ -16,7 +16,7 @@
 #include "base/threading/non_thread_safe.h"
 #include "ui/gfx/geometry/size.h"
 
-namespace gfx {
+namespace gl {
 class GLImage;
 }
 
@@ -40,7 +40,7 @@ class VaapiPicture : public base::NonThreadSafe {
   virtual bool AllowOverlay() const;
 
   // Returns the |GLImage|, if any, to bind to the texture.
-  virtual scoped_refptr<gfx::GLImage> GetImageToBind() = 0;
+  virtual scoped_refptr<gl::GLImage> GetImageToBind() = 0;
 
   // Downloads the |va_surface| into the picture, potentially scaling
   // it if needed.