Fix filesystem API file_handlers to work for drive on ChromeOS.

webkit/chromeos/fileapi/cros_mount_point_provider.h

Index: webkit/chromeos/fileapi/cros_mount_point_provider.h
diff --git a/webkit/chromeos/fileapi/cros_mount_point_provider.h b/webkit/chromeos/fileapi/cros_mount_point_provider.h
index 21cb7ccc88a1f54e2606495aab4fa80a23cc4f58..e82973b84b77f41f074cc024d7ad2d9e03ed94b3 100644
--- a/webkit/chromeos/fileapi/cros_mount_point_provider.h
+++ b/webkit/chromeos/fileapi/cros_mount_point_provider.h
@@ -98,11 +98,11 @@ class WEBKIT_STORAGE_EXPORT CrosMountPointProvider
   virtual void RevokeAccessForExtension(
       const std::string& extension_id) OVERRIDE;
   virtual bool GetVirtualPath(const base::FilePath& filesystem_path,
-                              base::FilePath* virtual_path) OVERRIDE;
+                              base::FilePath* virtual_path) const OVERRIDE;
 
  private:
   fileapi::RemoteFileSystemProxyInterface* GetRemoteProxy(
-      const std::string& mount_name) const;
+      const fileapi::FileSystemURL& url) const;
 
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
   scoped_ptr<FileAccessPermissions> file_access_permissions_;