content: implement unittests backend for Ozone GBM

ui/gl/test/run_all_unittests.cc

Index: ui/gl/test/run_all_unittests.cc
diff --git a/ui/gl/test/run_all_unittests.cc b/ui/gl/test/run_all_unittests.cc
index c12715d6c062c53120e39d70c1b7a7361f7cf283..b2057f27cc0b21b07332a277f44e35ad2fa1d43c 100644
--- a/ui/gl/test/run_all_unittests.cc
+++ b/ui/gl/test/run_all_unittests.cc
@@ -14,6 +14,7 @@
 #if defined(USE_OZONE)
 #include "base/message_loop/message_loop.h"
 #include "ui/ozone/public/client_native_pixmap_factory.h"
+#include "ui/ozone/public/ozone_gpu_test_helper.h"
 #endif
 
 namespace {
@@ -33,6 +34,7 @@ class GlTestSuite : public base::TestSuite {
 #if defined(USE_OZONE)
     // On Ozone, the backend initializes the event system using a UI thread.
     message_loop_.reset(new base::MessageLoopForUI);
+    ozone_test_ = ui::OzoneInitializerForTest::Create();
     client_native_pixmap_factory_ = ui::ClientNativePixmapFactory::Create();
     ui::ClientNativePixmapFactory::SetInstance(
         client_native_pixmap_factory_.get());
@@ -46,6 +48,7 @@ class GlTestSuite : public base::TestSuite {
  private:
 #if defined(USE_OZONE)
   std::unique_ptr<base::MessageLoop> message_loop_;
+  std::unique_ptr<ui::OzoneInitializerForTest> ozone_test_;
   std::unique_ptr<ui::ClientNativePixmapFactory> client_native_pixmap_factory_;
 #endif
   DISALLOW_COPY_AND_ASSIGN(GlTestSuite);