gdata: Support mouting archive file in GData cache

chrome/browser/chromeos/extensions/file_browser_private_api.h

Index: chrome/browser/chromeos/extensions/file_browser_private_api.h
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.h b/chrome/browser/chromeos/extensions/file_browser_private_api.h
index 4bdddee4ee9107c4e6221be4f7f2984d3614bf97..63e312a9ca585a0ea1c615ce02699104301828ce 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.h
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.h
@@ -246,6 +246,11 @@ class AddMountFunction
   // GetLocalPathsOnFileThreadAndRunCallbackOnUIThread.
   void GetLocalPathsResponseOnUIThread(const std::string& mount_type_str,
                                        const SelectedFileInfoList& files);
+  // A callback method to handle the result of SetMountedState.
+  void OnMountedStateSet(const std::string& mount_type,
+                         const FilePath::StringType& file_name,
+                         base::PlatformFileError error,
+                         const FilePath& file_path);
 
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.addMount");
 };
@@ -267,6 +272,10 @@ class RemoveMountFunction
   // GetLocalPathsOnFileThreadAndRunCallbackOnUIThread.
   void GetLocalPathsResponseOnUIThread(const SelectedFileInfoList& files);
 
+  // A callback method to handle the result of SetMountedState.
+  void OnMountedStateSet(base::PlatformFileError error,
+                         const FilePath& file_path);
+
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.removeMount");
 };