Add new E2E sync multi profiles tests. This should not affect any existing

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

Index: chrome/browser/sync/test/integration/sync_test.h
diff --git a/chrome/browser/sync/test/integration/sync_test.h b/chrome/browser/sync/test/integration/sync_test.h
index fec25ef51c251152665b3564bf28f6fc64778d10..bf4d501e919b51e1201908db7c0e233fb1e06656 100644
--- a/chrome/browser/sync/test/integration/sync_test.h
+++ b/chrome/browser/sync/test/integration/sync_test.h
@@ -25,6 +25,7 @@
 class ProfileSyncService;
 class ProfileSyncServiceHarness;
 class P2PInvalidationForwarder;
+class P2PSyncRefresher;
 
 namespace base {
 class CommandLine;
@@ -364,6 +365,10 @@ class SyncTest : public InProcessBrowserTest {
   // of this activity to its peer sync clients.
   ScopedVector<P2PInvalidationForwarder> invalidation_forwarders_;
 
+  // A set of objects to listen for commit activity and broadcast refresh
+  // notifications of this activity to its peer sync clients.
+  ScopedVector<P2PSyncRefresher> sync_refreshers_;
+
   // Collection of pointers to FakeServerInvalidation objects for each profile.
   std::vector<fake_server::FakeServerInvalidationService*>
       fake_server_invalidation_services_;