Sync/Valgrind: Add gmock printers for SyncChange, SyncData, SyncError.

chrome/browser/sync/api/sync_data.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SYNC_API_SYNC_DATA_H_
 #define CHROME_BROWSER_SYNC_API_SYNC_DATA_H_
 #pragma once
 
+#include <iosfwd>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/sync/syncable/model_type.h"
 #include "chrome/browser/sync/util/immutable.h"
 
 namespace sync_pb {
 class EntitySpecifics;
 class SyncEntity;
@@ skipping 49 matching lines @@
   // Returns the non unique title (for debugging). Currently only set for data
   // going TO the syncer, not from.
   const std::string& GetTitle() const;
 
   // Should only be called by sync code when IsLocal() is false.
   int64 GetRemoteId() const;
 
   // Whether this sync data is for local data or data coming from the syncer.
   bool IsLocal() const;
 
+  std::string ToString() const;
+
   // TODO(zea): Query methods for other sync properties: parent, successor, etc.
 
  private:
   // Necessary since we forward-declare sync_pb::SyncEntity; see
   // comments in immutable.h.
   struct ImmutableSyncEntityTraits {
     typedef sync_pb::SyncEntity* Wrapper;
 
     static void InitializeWrapper(Wrapper* wrapper);
 
@@ skipping 16 matching lines @@
   // Whether this SyncData holds valid data.
   bool is_valid_;
 
   // Equal to sync_api::kInvalidId iff this is local.
   int64 id_;
 
   // The actual shared sync entity being held.
   ImmutableSyncEntity immutable_entity_;
 };
 
+// gmock printer helper.
+void PrintTo(const SyncData& sync_data, std::ostream* os);
+
 #endif  // CHROME_BROWSER_SYNC_API_SYNC_DATA_H_