Move code in ui/gl/* from gfx:: to gl::

ui/gl/gl_image_surface_texture.h

Index: ui/gl/gl_image_surface_texture.h
diff --git a/ui/gl/gl_image_surface_texture.h b/ui/gl/gl_image_surface_texture.h
index 52f575ae62e934216ba9ed2c2400131da30d0a11..878a6ae560773cca00f535a72c411f0c00e48a0d 100644
--- a/ui/gl/gl_image_surface_texture.h
+++ b/ui/gl/gl_image_surface_texture.h
@@ -14,17 +14,15 @@
 #include "ui/gl/gl_export.h"
 #include "ui/gl/gl_image.h"
 
-namespace gfx {
-class SurfaceTexture;
-}
-
 namespace gl {
 
+class SurfaceTexture;
+
 class GL_EXPORT GLImageSurfaceTexture : public GLImage {
  public:
   explicit GLImageSurfaceTexture(const gfx::Size& size);
 
-  bool Initialize(gfx::SurfaceTexture* surface_texture);
+  bool Initialize(gl::SurfaceTexture* surface_texture);
 
   // Overridden from GLImage:
   void Destroy(bool have_context) override;
@@ -49,7 +47,7 @@ class GL_EXPORT GLImageSurfaceTexture : public GLImage {
   ~GLImageSurfaceTexture() override;
 
  private:
-  scoped_refptr<gfx::SurfaceTexture> surface_texture_;
+  scoped_refptr<gl::SurfaceTexture> surface_texture_;
   const gfx::Size size_;
   GLint texture_id_;
   base::ThreadChecker thread_checker_;