content: implement unittests backend for Ozone GBM

content/test/content_test_suite.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/test/content_test_suite.h"
 
 #include "base/base_paths.h"
 #include "base/base_switches.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/message_loop/message_loop.h"
 #include "build/build_config.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/test/test_content_client_initializer.h"
 #include "gpu/config/gpu_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
 #include "ui/gfx/win/dpi.h"
 #endif
@@ skipping 57 matching lines @@
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool autorelease_pool;
 #if !defined(OS_IOS)
   mock_cr_app::RegisterMockCrApp();
 #endif
 #endif
 
 #if defined(OS_WIN)
   gfx::SetDefaultDeviceScaleFactor(1.0f);
 #endif
+#if defined(USE_OZONE)
+  // Ozone backend needs MessageLoopForUI.
+  scoped_ptr<base::MessageLoop> message_loop;
+  if (!base::MessageLoop::current())

[reveman, 2016/01/11 19:13:51]

is this conditional needed?

[dshwang, 2016/01/11 20:17:45]

content_gl_tests calls it after creating MessageLoopForUI.

+    message_loop.reset(new base::MessageLoopForUI);
+  ozone_ = ui::OzoneInitializerForTest::Create();
+  DCHECK(ozone_);
+#endif
 
   ContentTestSuiteBase::Initialize();
   {
     ContentClient client;
     ContentTestSuiteBase::RegisterContentSchemes(&client);
   }
   RegisterPathProvider();
 #if !defined(OS_IOS)
   media::InitializeMediaLibrary();
   // When running in a child process for Mac sandbox tests, the sandbox exists
@@ skipping 17 matching lines @@
     client_native_pixmap_factory_ = ui::ClientNativePixmapFactory::Create();
     ui::ClientNativePixmapFactory::SetInstance(
         client_native_pixmap_factory_.get());
     ui::ClientNativePixmapFactory::GetInstance()->Initialize(
         ui::OzonePlatform::GetInstance()->OpenClientNativePixmapDevice());
   }
 #endif
 }
 
 }  // namespace content