mash: Fix shelf window property use in Chrome.

chrome/browser/ui/ash/launcher/chrome_launcher_controller.h

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
index 035ac7da2a28addf70503927b321aa6a4505dcfa..6188d404b04332630576f863a5aaf6ce0f22a108 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.h
@@ -14,6 +14,7 @@
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_types.h"
+#include "chrome/browser/ui/ash/launcher/settings_window_observer.h"
 #include "extensions/common/constants.h"
 
 class AccountId;
@@ -249,6 +250,8 @@ class ChromeLauncherController {
  private:
   static ChromeLauncherController* instance_;
 
+  SettingsWindowObserver settings_window_observer_;

[James Cook, 2016/10/01 00:16:21]

Hmm. I see why you did this, but this is mostly a pure-virtual interface class.
Is there anywhere else this could go that has the right lifetime?

[msw, 2016/10/03 19:14:23]

Where do you suggest? ChromeLauncherControllerImpl was the previous owner (via
BrowserStatusMonitor); this is just the base class also used in mash.

+
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };