[GCM] Fix memory leaks

google_apis/gcm/engine/gcm_store_impl.h

 // Copyright 2014 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 GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_
 #define GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 56 matching lines @@
                                    int64 serial_number,
                                    const UpdateCallback& callback) OVERRIDE;
   virtual void RemoveUserSerialNumber(const std::string& username,
                                       const UpdateCallback& callback) OVERRIDE;
 
  private:
   typedef std::map<std::string, int> AppIdToMessageCountMap;
 
   // Continuation to update the per-app message counts after a load.
   void LoadContinuation(const LoadCallback& callback,
-                        const LoadResult& result);
+                        scoped_ptr<LoadResult> result);
 
   // Continuation to update the per-app message counts when adding messages.
   // In particular, if a message fails to add, the message count is decremented.
   void AddOutgoingMessageContinuation(const UpdateCallback& callback,
                                       const std::string& app_id,
                                       bool success);
 
   // Continuation to update the per-app message counts when removing messages.
   // Note: if doing a read-then-write when removing messages proves expensive,
   // an in-memory mapping of persisted message id to app could be maintained
@@ skipping 12 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 
   base::WeakPtrFactory<GCMStoreImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMStoreImpl);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_