Ports XMPP Invalidation code from drive_file_sync_service in /sync_file_system to /google_apis/driv…

chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc

Index: chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc b/chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc
index c91de8f769c5648be1e964b7a1157822af756df0..9de4058b2a0cc684d2d1ca5b9d548807060f3893 100644
--- a/chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_file_sync_service_mock_unittest.cc
@@ -198,6 +198,14 @@ ACTION(InvokeDidApplyRemoteChange) {
       FROM_HERE, base::Bind(arg3, SYNC_STATUS_OK));
 }
 
+ACTION(InvokeGetChangeListWithEmptyChange) {
+  scoped_ptr<google_apis::ResourceList> resource_list(
+      new google_apis::ResourceList());
+  base::MessageLoopProxy::current()->PostTask(
+      FROM_HERE, base::Bind(arg1, google_apis::HTTP_SUCCESS,
+                            base::Passed(&resource_list)));
+}
+
 }  // namespace
 
 class MockRemoteServiceObserver : public RemoteFileSyncService::Observer {
@@ -587,6 +595,13 @@ class DriveFileSyncServiceMockTest : public testing::Test {
         .RetiresOnSaturation();
   }
 
+  void SetUpDriveServiceExpectCallsForEmptyRemoteChange() {
+    EXPECT_CALL(*mock_drive_service(),
+                GetChangeList(_, _))
+        .WillOnce(InvokeGetChangeListWithEmptyChange())
+        .RetiresOnSaturation();
+  }
+
   // End of mock setup helpers -----------------------------------------------
 
  private:
@@ -705,6 +720,8 @@ TEST_F(DriveFileSyncServiceMockTest, RegisterNewOrigin) {
       "chromeos/sync_file_system/listing_files_in_empty_directory.json",
       kDirectoryResourceId);
 
+  SetUpDriveServiceExpectCallsForEmptyRemoteChange();
+
   SetUpDriveSyncService(true);
   bool done = false;
   sync_service()->RegisterOriginForTrackingChanges(