content: implement unittests backend for Ozone GBM

gpu/command_buffer/common/unittest_main.cc

Index: gpu/command_buffer/common/unittest_main.cc
diff --git a/gpu/command_buffer/common/unittest_main.cc b/gpu/command_buffer/common/unittest_main.cc
index ed03dca8b6f2fee0183e3c7d29fb69f33875a7ca..a76adeb04888f9795187f63baf4538ff62753de5 100644
--- a/gpu/command_buffer/common/unittest_main.cc
+++ b/gpu/command_buffer/common/unittest_main.cc
@@ -3,10 +3,28 @@
 // found in the LICENSE file.
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 
+#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
+
 int main(int argc, char** argv) {
+  base::CommandLine::Init(argc, argv);
+  base::AtExitManager exit_manager;
+#if defined(USE_OZONE)
+  base::MessageLoopForUI message_loop;
+  std::unique_ptr<ui::OzoneInitializerForTest> ozone_test =
+      ui::OzoneInitializerForTest::Create();
+  std::unique_ptr<ui::ClientNativePixmapFactory> client_native_pixmap_factory_ =
+      ui::ClientNativePixmapFactory::Create();
+  ui::ClientNativePixmapFactory::SetInstance(
+      client_native_pixmap_factory_.get());
+#endif
   base::TestSuite test_suite(argc, argv);
   return base::LaunchUnitTests(
       argc, argv,