Follow-up fixes to changing namespace gfx to gl.

ui/gl/gl_context_cgl.h

Index: ui/gl/gl_context_cgl.h
diff --git a/ui/gl/gl_context_cgl.h b/ui/gl/gl_context_cgl.h
index 726a083da8b29c4477d8ca4c0ab485d0d5eab5b0..156953f48733bed7c9bc412f3f9aa8f8129a9ea9 100644
--- a/ui/gl/gl_context_cgl.h
+++ b/ui/gl/gl_context_cgl.h
@@ -31,7 +31,7 @@ class GLContextCGL : public GLContextReal {
   void OnSetSwapInterval(int interval) override;
   void SetSafeToForceGpuSwitch() override;
   bool ForceGpuSwitchIfNeeded() override;
-  gl::YUVToRGBConverter* GetYUVToRGBConverter() override;
+  YUVToRGBConverter* GetYUVToRGBConverter() override;
 
  protected:
   ~GLContextCGL() override;
@@ -42,7 +42,7 @@ class GLContextCGL : public GLContextReal {
 
   void* context_;
   GpuPreference gpu_preference_;
-  std::unique_ptr<gl::YUVToRGBConverter> yuv_to_rgb_converter_;
+  std::unique_ptr<YUVToRGBConverter> yuv_to_rgb_converter_;
 
   CGLPixelFormatObj discrete_pixelformat_;