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..4596fd414d182f36dc96f0110e38ca322a1c79e8 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
@@ -8,6 +8,7 @@
 #include "base/platform_file.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "webkit/fileapi/syncable/sync_status_code.h"
+#include "webkit/quota/quota_types.h"
 
 namespace fileapi {
 class FileSystemContext;
@@ -37,6 +38,21 @@ 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_