gl, ozone: add new GLImageBindTest unittests and make ozone run it.

ui/gl/test/gl_image_test_support.cc

Index: ui/gl/test/gl_image_test_support.cc
diff --git a/ui/gl/test/gl_image_test_support.cc b/ui/gl/test/gl_image_test_support.cc
index 79996d5edf11fc86a70cb6675bcef1de2bd4e3b4..59636197d5d096fe242fea05d91c80e053d4e69e 100644
--- a/ui/gl/test/gl_image_test_support.cc
+++ b/ui/gl/test/gl_image_test_support.cc
@@ -9,19 +9,10 @@
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 
-#if defined(USE_OZONE)
-#include "base/message_loop/message_loop.h"
-#endif
-
 namespace gl {
 
 // static
 void GLImageTestSupport::InitializeGL() {
-#if defined(USE_OZONE)
-  // On Ozone, the backend initializes the event system using a UI thread.
-  base::MessageLoopForUI main_loop;
-#endif
-
   std::vector<gfx::GLImplementation> allowed_impls;
   GetAllowedGLImplementations(&allowed_impls);
   DCHECK(!allowed_impls.empty());