Fix filesystem API file_handlers to work for drive on ChromeOS.

webkit/fileapi/external_mount_points.h

Index: webkit/fileapi/external_mount_points.h
diff --git a/webkit/fileapi/external_mount_points.h b/webkit/fileapi/external_mount_points.h
index a2660c24536d118b643e29f8baadc9fadeb786fb..ab0fea2afc7852ae51d70a7bc04993da1822af47 100644
--- a/webkit/fileapi/external_mount_points.h
+++ b/webkit/fileapi/external_mount_points.h
@@ -85,6 +85,9 @@ class WEBKIT_STORAGE_EXPORT ExternalMountPoints
       const GURL& origin,
       FileSystemType type,
       const base::FilePath& path) const OVERRIDE;
+  virtual bool GetVirtualPath(const base::FilePath& full_path,
+                              base::FilePath* virtual_path) const OVERRIDE;
+
 
   // Retrieves the remote file system proxy for the registered file system.
   // Returns NULL if there is no file system with the given name, or if the file
@@ -95,18 +98,6 @@ class WEBKIT_STORAGE_EXPORT ExternalMountPoints
   // Returns a list of registered MountPointInfos (of <mount_name, path>).
   void AddMountPointInfosTo(std::vector<MountPointInfo>* mount_points) const;
 
-  // Converts a path on a registered file system to virtual path relative to the
-  // file system root. E.g. if 'Downloads' file system is mapped to
-  // '/usr/local/home/Downloads', and |absolute| path is set to
-  // '/usr/local/home/Downloads/foo', the method will set |virtual_path| to
-  // 'Downloads/foo'.
-  // Returns false if the path cannot be resolved (e.g. if the path is not
-  // part of any registered filesystem).
-  //
-  // Returned virtual_path will have normalized path separators.
-  bool GetVirtualPath(const base::FilePath& absolute_path,
-                      base::FilePath* virtual_path);
-
   // Returns the virtual root path that looks like /<mount_name>.
   base::FilePath CreateVirtualRootPath(const std::string& mount_name) const;