Implement QM::GetOriginsModifiedSince for browser data deleter support

webkit/quota/mock_storage_client.h

Index: webkit/quota/mock_storage_client.h
diff --git a/webkit/quota/mock_storage_client.h b/webkit/quota/mock_storage_client.h
index 7a25c44021dbe79601e64ecfd6f61aba10467e00..bf381adc3d244571b360cc18002725f4fc5bd163 100644
--- a/webkit/quota/mock_storage_client.h
+++ b/webkit/quota/mock_storage_client.h
@@ -11,6 +11,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/task.h"
+#include "base/time.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/quota/quota_client.h"
 
@@ -39,6 +40,8 @@ class MockStorageClient : public QuotaClient {
 
   void AddOriginToErrorSet(const GURL& origin_url, StorageType type);
 
+  base::Time IncrementMockTime();
+
   // QuotaClient methods.
   virtual QuotaClient::ID id() const OVERRIDE;
   virtual void OnQuotaManagerDestroyed() OVERRIDE;
@@ -78,6 +81,8 @@ class MockStorageClient : public QuotaClient {
   std::set<GetOriginsCallback*> origins_callbacks_;
   std::set<DeletionCallback*> deletion_callbacks_;
 
+  int mock_time_counter_;
+
   ScopedRunnableMethodFactory<MockStorageClient> runnable_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MockStorageClient);