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

ui/gl/gl_glx_api_implementation.cc

Index: ui/gl/gl_glx_api_implementation.cc
diff --git a/ui/gl/gl_glx_api_implementation.cc b/ui/gl/gl_glx_api_implementation.cc
index 703563f11251afd0d5e0f4c86309adeb89c474d6..d638701a9d38c7ae5ef1b475641dd6655e3ca178 100644
--- a/ui/gl/gl_glx_api_implementation.cc
+++ b/ui/gl/gl_glx_api_implementation.cc
@@ -9,7 +9,7 @@
 #include "base/strings/string_util.h"
 #include "ui/gl/gl_implementation.h"
 
-namespace gfx {
+namespace gl {
 
 RealGLXApi* g_real_glx;
 
@@ -119,6 +119,4 @@ bool GetGLWindowSystemBindingInfoGLX(GLWindowSystemBindingInfo* info) {
   return true;
 }
 
-}  // namespace gfx
-
-
+}  // namespace gl