Add an update warning for downloading over mobile data

chrome/browser/ui/webui/settings/about_handler.h

Index: chrome/browser/ui/webui/settings/about_handler.h
diff --git a/chrome/browser/ui/webui/settings/about_handler.h b/chrome/browser/ui/webui/settings/about_handler.h
index 3de70b602ec35d17ddaccd6b69153c64135e8fa3..a7cc00b8336836166f9ba77ffe0a62a3070af36c 100644
--- a/chrome/browser/ui/webui/settings/about_handler.h
+++ b/chrome/browser/ui/webui/settings/about_handler.h
@@ -108,15 +108,24 @@ class AboutHandler : public settings::SettingsPageUIHandler,
 
   // Checks for and applies update, triggered by JS.
   void HandleRequestUpdate(const base::ListValue* args);
+  // Checks for and applies update over cellular connection, triggered by JS.
+  // Target version and size should be included in the list of arguments.
+  void HandleRequestUpdateOverCellular(const base::ListValue* args);
 
 #endif
 
   // Checks for and applies update.
   void RequestUpdate();
 
+  // Checks for and applies update over cellular connection to the given target.
+  void RequestUpdateOverCellular(std::string& target_version,
+                                 int64_t target_size);
+
   // Callback method which forwards status updates to the page.
   void SetUpdateStatus(VersionUpdater::Status status,
                        int progress,
+                       const std::string& version,
+                       const int64_t size,
                        const base::string16& fail_message);
 
 #if defined(OS_MACOSX)