Add OzoneGLImpl interface.

ui/gl/test/gl_surface_test_support.cc

Index: ui/gl/test/gl_surface_test_support.cc
diff --git a/ui/gl/test/gl_surface_test_support.cc b/ui/gl/test/gl_surface_test_support.cc
index aae8fd79d497a7cdfb111c3d4ef8f5184761b0eb..72e074cfabe055253e5140d170f0fa529506b577 100644
--- a/ui/gl/test/gl_surface_test_support.cc
+++ b/ui/gl/test/gl_surface_test_support.cc
@@ -14,6 +14,10 @@
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/init/gl_factory.h"
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/ozone_platform.h"
+#endif
+
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #include "ui/platform_window/x11/x11_window.h"
@@ -83,6 +87,10 @@ void GLSurfaceTestSupport::InitializeOneOffImplementation(
 
 // static
 void GLSurfaceTestSupport::InitializeOneOffWithMockBindings() {
+#if defined(USE_OZONE)
+  // This function skips where Ozone is otherwise initialized.
+  ui::OzonePlatform::InitializeForGPU();
+#endif
   InitializeOneOffImplementation(kGLImplementationMockGL, false);
 }