Remove duplicated code from sync related unit tests.

chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc

Index: chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
diff --git a/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc b/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
index 5dddca5be2f4328cdcb018122fbe1b4c99d3cf87..7cb36181caaed6f6062e4cb4b2ec57ef3c50c3c1 100644
--- a/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
+++ b/chrome/browser/notifications/sync_notifier/chrome_notifier_service_unittest.cc
@@ -24,6 +24,7 @@
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "sync/api/sync_change.h"
 #include "sync/api/sync_change_processor.h"
+#include "sync/api/sync_change_processor_delegator.h"
 #include "sync/api/sync_error_factory.h"
 #include "sync/api/sync_error_factory_mock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -34,6 +35,7 @@ using sync_pb::EntitySpecifics;
 using syncer::SyncData;
 using syncer::SyncChange;
 using syncer::SyncChangeList;
+using syncer::SyncChangeProcessorDelegator;
 using syncer::SyncDataList;
 using syncer::SYNCED_NOTIFICATIONS;
 using notifier::SyncedNotification;
@@ -97,38 +99,11 @@ class TestChangeProcessor : public syncer::SyncChangeProcessor {
   DISALLOW_COPY_AND_ASSIGN(TestChangeProcessor);
 };
 
-class SyncChangeProcessorDelegate : public syncer::SyncChangeProcessor {
- public:
-  explicit SyncChangeProcessorDelegate(SyncChangeProcessor* recipient)
-      : recipient_(recipient) {
-    EXPECT_TRUE(recipient_);
-  }
-  virtual ~SyncChangeProcessorDelegate() {}
-
-  // syncer::SyncChangeProcessor implementation.
-  virtual syncer::SyncError ProcessSyncChanges(
-      const tracked_objects::Location& from_here,
-      const SyncChangeList& change_list) OVERRIDE {
-    return recipient_->ProcessSyncChanges(from_here, change_list);
-  }
-
-  virtual syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const
-      OVERRIDE {
-    return recipient_->GetAllSyncData(type);
-  }
-
- private:
-  // The recipient of all sync changes.
-  SyncChangeProcessor* recipient_;
-
-  DISALLOW_COPY_AND_ASSIGN(SyncChangeProcessorDelegate);
-};
-
 class ChromeNotifierServiceTest : public testing::Test {
  public:
   ChromeNotifierServiceTest()
       : sync_processor_(new TestChangeProcessor),
-        sync_processor_delegate_(new SyncChangeProcessorDelegate(
+        sync_processor_delegate_(new SyncChangeProcessorDelegator(
             sync_processor_.get())) {}
   virtual ~ChromeNotifierServiceTest() {}