Quota: Return a pair of usage and granted_quota on requesting quota.

content/child/quota_dispatcher.h

Index: content/child/quota_dispatcher.h
diff --git a/content/child/quota_dispatcher.h b/content/child/quota_dispatcher.h
index d42d02d8d91845ed40e1b08000af646d9c7fa26c..818ffefcfa714c97477eec52af9dc121e6cd3182 100644
--- a/content/child/quota_dispatcher.h
+++ b/content/child/quota_dispatcher.h
@@ -39,7 +39,7 @@ class QuotaDispatcher : public webkit_glue::WorkerTaskRunner::Observer {
    public:
     virtual ~Callback() {}
     virtual void DidQueryStorageUsageAndQuota(int64 usage, int64 quota) = 0;
-    virtual void DidGrantStorageQuota(int64 granted_quota) = 0;
+    virtual void DidGrantStorageQuota(int64 usage, int64 granted_quota) = 0;
     virtual void DidFail(quota::QuotaStatusCode status) = 0;
   };
 
@@ -77,6 +77,7 @@ class QuotaDispatcher : public webkit_glue::WorkerTaskRunner::Observer {
                                     int64 current_usage,
                                     int64 current_quota);
   void DidGrantStorageQuota(int request_id,
+                            int64 current_usage,
                             int64 granted_quota);
   void DidFail(int request_id,
                quota::QuotaStatusCode error);