Automatic Win8 default browser registration for the ash unittests.

ash/test/ash_test_base.cc

Index: ash/test/ash_test_base.cc
diff --git a/ash/test/ash_test_base.cc b/ash/test/ash_test_base.cc
index 5b4a6b6ecd85a1fbc756b3c7eeebe6985131d2f7..e41f4fae06f5d061e707fbe8720a2f025bfaad00 100644
--- a/ash/test/ash_test_base.cc
+++ b/ash/test/ash_test_base.cc
@@ -35,6 +35,7 @@
 #include "base/win/windows_version.h"
 #include "ui/aura/remote_root_window_host_win.h"
 #include "ui/aura/root_window_host_win.h"
+#include "win8/test/test_registrar_constants.h"
 #endif
 
 namespace ash {
@@ -106,7 +107,8 @@ void AshTestBase::SetUp() {
   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
     metro_viewer_host_.reset(new TestMetroViewerProcessHost("viewer"));
     ASSERT_TRUE(
-        metro_viewer_host_->LaunchImmersiveChromeAndWaitForConnection());
+        metro_viewer_host_->LaunchImmersiveChromeAndWaitForConnection(
+            win8::test::kDefaultTestAppUserModelId));
     aura::RemoteRootWindowHostWin* root_window_host =
         aura::RemoteRootWindowHostWin::Instance();
     ASSERT_TRUE(root_window_host != NULL);