[Mac] Add system share menu

chrome/browser/app_controller_mac.h

Index: chrome/browser/app_controller_mac.h
diff --git a/chrome/browser/app_controller_mac.h b/chrome/browser/app_controller_mac.h
index ff1eb55bcad03102ddb935ed339dbc33673dfcb2..08160cefe3edaf6ebd32cc4b7d0d0b15fe3d4ef0 100644
--- a/chrome/browser/app_controller_mac.h
+++ b/chrome/browser/app_controller_mac.h
@@ -31,6 +31,7 @@ class Profile;
 @class ProfileMenuController;
 class QuitWithAppsController;
 class ScopedKeepAlive;
+@class ShareMenuController;
 
 namespace ui {
 class WorkAreaWatcherObserver;
@@ -73,6 +74,9 @@ class WorkAreaWatcherObserver;
   // available when multiple profiles is enabled.
   base::scoped_nsobject<ProfileMenuController> profileMenuController_;
 
+  // Controller for the macOS system share menu.
+  base::scoped_nsobject<ShareMenuController> shareMenuController_;
+
   // If we're told to open URLs (in particular, via |-application:openFiles:| by
   // Launch Services) before we've launched the browser, we queue them up in
   // |startupUrls_| so that they can go in the first browser window/tab.