Add GetUsageAndQuota() to Syncable API

chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h

Index: chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h
diff --git a/chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h b/chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h
index d5c664ce368eae9f9864624c8cf5fb133d7f10b7..7df14b3fc96d49a0a7b79d477e9e6bdb202934e0 100644
--- a/chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h
+++ b/chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h
@@ -37,6 +37,21 @@ class SyncFileSystemRequestFileSystemFunction
                          const GURL& root_url);
 };
 
+class SyncFileSystemGetUsageAndQuotaFunction
+    : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("syncFileSystem.getUsageAndQuota");
+
+ protected:
+  virtual ~SyncFileSystemGetUsageAndQuotaFunction() {}
+  virtual bool RunImpl() OVERRIDE;
+
+ private:
+  void DidGetUsageAndQuota(quota::QuotaStatusCode status,
+                           int64 usage,
+                           int64 quota);
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_API_H_