Set sync-notification-method to "transitional" for integration tests.

The sync integration tests do not have a fake Tango server that provides
clients with XMPP notifications. Therefore, we rely on clients nudging
each other via the server when changes need to be synced.

Until we implement a fake Tango server, this switch needs to be set for
all integration tests.

BUG=48141
TEST=sync_integration_tests:echo

Review URL: http://codereview.chromium.org/2834051

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52939 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/live_sync/live_sync_test.cc

@@ -22,7 +22,7 @@ void LiveSyncTest::SetUp() {
   // At this point, the browser hasn't been launched, and no services are
   // available.  But we can verify our command line parameters and fail
   // early.
-  const CommandLine* cl = CommandLine::ForCurrentProcess();
+  CommandLine* cl = CommandLine::ForCurrentProcess();
   if (cl->HasSwitch(switches::kPasswordFileForTest)) {
     // Read GAIA credentials from a local password file if specified via the
     // "--password-file-for-test" command line switch. Note: The password file
@@ -55,6 +55,13 @@ void LiveSyncTest::SetUp() {
         << "without specifying --" << switches::kSyncPasswordForTest;
   }
 
+  // TODO(rsimha): Until we implement a fake Tango server against which tests
+  // can run, we need to set the --sync-notification-method to "transitional".
+  if (!cl->HasSwitch(switches::kSyncNotificationMethod)) {
+    cl->AppendSwitchWithValue(switches::kSyncNotificationMethod,
+        "transitional");
+  }
+
   // Unless a sync server was explicitly provided, run a test one locally.
   // TODO(ncarter): It might be better to allow the user to specify a choice
   // of sync server "providers" -- a script that could locate (or allocate)