Introduce a single call to grab default browser on Win8 for tests.

ash/test/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 "ash/test/test_suite.h"
 
 #include "ash/ash_switches.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "ui/compositor/compositor_setup.h"
 #include "ui/compositor/test/compositor_test_support.h"
 #include "ui/gfx/gfx_paths.h"
 
 #if defined(OS_MACOSX)
 #include "ash/test/test_suite_init.h"
 #endif
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "ui/base/win/atl_module.h"
 #include "win8/test/metro_registration_helper.h"
-#include "win8/test/open_with_dialog_controller.h"
 #include "win8/test/test_registrar_constants.h"
 #endif
 
 namespace ash {
 namespace test {
 
 AuraShellTestSuite::AuraShellTestSuite(int argc, char** argv)
     : TestSuite(argc, argv) {}
 
 void AuraShellTestSuite::Initialize() {
   base::TestSuite::Initialize();
 
 #if defined(OS_WIN)
   if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
       !CommandLine::ForCurrentProcess()->HasSwitch(
           ash::switches::kForceAshToDesktop)) {
-    ASSERT_TRUE(win8::RegisterTestDefaultBrowser(
-        win8::test::kDefaultTestAppUserModelId,
-        win8::test::kDefaultTestExeName));
-
+    com_initializer_.reset(new base::win::ScopedCOMInitializer());
     ui::win::CreateATLModuleIfNeeded();
-
-    std::vector<base::string16> choices;
-    win8::OpenWithDialogController controller;
-    controller.RunSynchronously(NULL, L"http", win8::test::kDefaultTestExeName,
-                                &choices);
+    ASSERT_TRUE(win8::MakeTestDefaultBrowserSynchronously());
   }
 #endif
 
   gfx::RegisterPathProvider();
   ui::RegisterPathProvider();
 
 #if defined(OS_MACOSX)
   ash::test::OverrideFrameworkBundle();
 #endif
 
   // Force unittests to run using en-US so if we test against string
   // output, it'll pass regardless of the system language.
   ui::ResourceBundle::InitSharedInstanceWithLocale("en-US", NULL);
   ui::CompositorTestSupport::Initialize();
   ui::SetupTestCompositor();
 }
 
 void AuraShellTestSuite::Shutdown() {
   ui::CompositorTestSupport::Terminate();
   ui::ResourceBundle::CleanupSharedInstance();
+#if defined(OS_WIN)
+  com_initializer_.reset();
+#endif
   base::TestSuite::Shutdown();
 }
 
 }  // namespace test
 }  // namespace ash