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

ui/wm/test/run_all_unittests.cc

Index: ui/wm/test/run_all_unittests.cc
diff --git a/ui/wm/test/run_all_unittests.cc b/ui/wm/test/run_all_unittests.cc
index be780e8a9352cfc647d22267acc6f25d51ef1ba8..d82aca30dee6fc5379b5515ebba6ef0fc4903c57 100644
--- a/ui/wm/test/run_all_unittests.cc
+++ b/ui/wm/test/run_all_unittests.cc
@@ -23,7 +23,7 @@ class WMTestSuite : public base::TestSuite {
  protected:
   void Initialize() override {
     base::TestSuite::Initialize();
-    gfx::GLSurfaceTestSupport::InitializeOneOff();
+    gl::GLSurfaceTestSupport::InitializeOneOff();
     ui::RegisterPathProvider();
 
     base::FilePath ui_test_pak_path;