Grant file access permissions for cached file paths to file browsers/handlers.

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 d207f94183eaf7fe4752de480a0b5bf1b715f811..c0af2517e5b3647b4ef227ca8b694fb50511267a 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.h
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.h
@@ -233,6 +233,8 @@ class AddMountFunction
  private:
   // Sends gdata mount event to renderers.
   void RaiseGDataMountEvent(gdata::GDataErrorCode error);
+  // Gives the extension renderer file permissions for the given path.
+  void GrantFilePermissionsToHost(const FilePath& path, int permissions);
   // Adds gdata mount point.
   void AddGDataMountPoint();
   // A callback method to handle the result of GData authentication request.