sync: Add helper class for P2P invalidations

chrome/browser/sync/test/integration/profile_sync_service_harness.h

Index: chrome/browser/sync/test/integration/profile_sync_service_harness.h
diff --git a/chrome/browser/sync/test/integration/profile_sync_service_harness.h b/chrome/browser/sync/test/integration/profile_sync_service_harness.h
index ee3c728fd321bb6333beefa86f70be99308f05a6..3a281f822040fc63329cf0e5ad2c6691cbb946a9 100644
--- a/chrome/browser/sync/test/integration/profile_sync_service_harness.h
+++ b/chrome/browser/sync/test/integration/profile_sync_service_harness.h
@@ -16,6 +16,7 @@
 
 class Profile;
 class StatusChangeChecker;
+class P2PInvalidationForwarder;
 
 namespace invalidation {
 class P2PInvalidationService;
@@ -234,6 +235,9 @@ class ProfileSyncServiceHarness
   // P2PInvalidationService associated with |profile_|.
   invalidation::P2PInvalidationService* p2p_invalidation_service_;
 
+  // An bridge between the ProfileSyncService and P2PInvalidationService.
+  scoped_ptr<P2PInvalidationForwarder> p2p_invalidation_forwarder_;
+
   // The harness of the client whose update progress marker we're expecting
   // eventually match.
   ProfileSyncServiceHarness* progress_marker_partner_;