Files.app: Add an private API to get a download URL

chrome/browser/chromeos/drive/file_system_interface.h

Index: chrome/browser/chromeos/drive/file_system_interface.h
diff --git a/chrome/browser/chromeos/drive/file_system_interface.h b/chrome/browser/chromeos/drive/file_system_interface.h
index 0ac85a4faa3931d955bd54148696d9e8821248d6..c45cf9c78099300441e496e732c24ae285bc9af7 100644
--- a/chrome/browser/chromeos/drive/file_system_interface.h
+++ b/chrome/browser/chromeos/drive/file_system_interface.h
@@ -112,8 +112,8 @@ typedef base::Callback<void(FileError error,
                             int64 bytes_used)> GetAvailableSpaceCallback;
 
 // Used to get the url to the sharing dialog.
-typedef base::Callback<void(FileError error,
-                            const GURL& share_url)> GetShareUrlCallback;
+typedef base::Callback<void(FileError error, const GURL& share_url)>
+    GetUrlCallback;
 
 // Used to get filesystem metadata.
 typedef base::Callback<void(const FileSystemMetadata&)>
@@ -387,10 +387,13 @@ class FileSystemInterface {
 
   // Fetches the url to the sharing dialog to be embedded in |embed_origin|,
   // for the specified file or directory. |callback| must not be null.
-  virtual void GetShareUrl(
-      const base::FilePath& file_path,
-      const GURL& embed_origin,
-      const GetShareUrlCallback& callback) = 0;
+  virtual void GetShareUrl(const base::FilePath& file_path,
+                           const GURL& embed_origin,
+                           const GetUrlCallback& callback) = 0;
+
+  // Fetches the url to download the file directry. |callback| must not be null.

[hashimoto, 2014/07/09 07:48:57]

nit: s/directry/directly/?

+  virtual void GetDownloadUrl(const base::FilePath& file_path,
+                              const GetUrlCallback& callback) = 0;
 
   // Returns miscellaneous metadata of the file system like the largest
   // timestamp. Used in chrome:drive-internals. |callback| must not be null.