Use base::Callback in Quota related code.

webkit/fileapi/file_system_quota_client.h

Index: webkit/fileapi/file_system_quota_client.h
diff --git a/webkit/fileapi/file_system_quota_client.h b/webkit/fileapi/file_system_quota_client.h
index 40456286600d5c8a0b493d539a68c1995405e468..35c0b79e911d7f71be3958cbf668901dd11edc09 100644
--- a/webkit/fileapi/file_system_quota_client.h
+++ b/webkit/fileapi/file_system_quota_client.h
@@ -43,15 +43,18 @@ class FileSystemQuotaClient : public quota::QuotaClient,
   virtual void OnQuotaManagerDestroyed() OVERRIDE;
   virtual void GetOriginUsage(const GURL& origin_url,
                               quota::StorageType type,
-                              GetUsageCallback* callback) OVERRIDE;
-  virtual void GetOriginsForType(quota::StorageType type,
-                                 GetOriginsCallback* callback) OVERRIDE;
-  virtual void GetOriginsForHost(quota::StorageType type,
-                                 const std::string& host,
-                                 GetOriginsCallback* callback) OVERRIDE;
-  virtual void DeleteOriginData(const GURL& origin,
-                                quota::StorageType type,
-                                DeletionCallback* callback) OVERRIDE;
+                              const GetUsageCallback& callback) OVERRIDE;
+  virtual void GetOriginsForType(
+      quota::StorageType type,
+      const GetOriginsCallback& callback) OVERRIDE;
+  virtual void GetOriginsForHost(
+      quota::StorageType type,
+      const std::string& host,
+      const GetOriginsCallback& callback) OVERRIDE;
+  virtual void DeleteOriginData(
+      const GURL& origin,
+      quota::StorageType type,
+      const DeletionCallback& callback) OVERRIDE;
 
  private:
   class GetOriginUsageTask;
@@ -61,16 +64,16 @@ class FileSystemQuotaClient : public quota::QuotaClient,
   class DeleteOriginTask;
 
   typedef std::pair<fileapi::FileSystemType, std::string> TypeAndHostOrOrigin;
-  typedef quota::CallbackQueueMap1<GetUsageCallback*,
+  typedef quota::CallbackQueueMap1<GetUsageCallback,
                                    TypeAndHostOrOrigin,
                                    int64
                                    > UsageCallbackMap;
-  typedef quota::CallbackQueueMap2<GetOriginsCallback*,
+  typedef quota::CallbackQueueMap2<GetOriginsCallback,
                                    fileapi::FileSystemType,
                                    const std::set<GURL>&,
                                    quota::StorageType
                                    > OriginsForTypeCallbackMap;
-  typedef quota::CallbackQueueMap2<GetOriginsCallback*,
+  typedef quota::CallbackQueueMap2<GetOriginsCallback,
                                    TypeAndHostOrOrigin,
                                    const std::set<GURL>&,
                                    quota::StorageType