drive: Apps.delete returns HTTP_NO_CONTENT on success.

chrome/browser/drive/drive_app_registry.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_H_
 #define CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 53 matching lines @@
   // Returns a list of Drive app information for the |file_extension| with
   // |mime_type|.
   void GetAppsForFile(const base::FilePath::StringType& file_extension,
                       const std::string& mime_type,
                       std::vector<DriveAppInfo>* apps) const;
 
   // Returns the list of all Drive apps installed.
   void GetAppList(std::vector<DriveAppInfo>* apps) const;
 
   // Uninstalls the app specified by |app_id|. This method sends requests to the
-  // remote server, and returns the result to |callback| asynchronously.
+  // remote server, and returns the result to |callback| asynchronously. When
+  // succeeded, the callback receives HTTP_NO_CONTENT, and error code otherwise.
   // |callback| must not be null.
   void UninstallApp(const std::string& app_id,
                     const UninstallCallback& callback);
 
   // Checks whether UinstallApp is supported. The feature is available only for
   // clients with whitelisted API keys (like Official Google Chrome build).
   static bool IsAppUninstallSupported();
 
   // Updates this registry by fetching the data from the server.
   void Update();
@@ skipping 42 matching lines @@
 // Icons do not have to be sorted by the icon size. If there are no icons in
 // the list, returns an empty URL.
 GURL FindPreferredIcon(const google_apis::InstalledApp::IconList& icons,
                        int preferred_size);
 
 }  // namespace util
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_DRIVE_DRIVE_APP_REGISTRY_H_