IWYU and other random cleanup in chrome/browser/ui.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
===================================================================
--- chrome/browser/ui/browser.h	(revision 149221)
+++ chrome/browser/ui/browser.h	(working copy)
@@ -18,7 +18,6 @@
 #include "base/string16.h"
 #include "chrome/browser/debugger/devtools_toggle_action.h"
 #include "chrome/browser/event_disposition.h"
-#include "chrome/browser/intents/device_attached_intent_source.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "chrome/browser/sessions/session_id.h"
@@ -49,6 +48,7 @@
 class BrowserToolbarModelDelegate;
 class BrowserTabRestoreServiceDelegate;
 class BrowserWindow;
+class DeviceAttachedIntentSource;
 class FindBarController;
 class FullscreenController;
 class PrefService;
@@ -896,8 +896,9 @@
   scoped_ptr<chrome::BrowserInstantController> instant_controller_;
 
   BookmarkBar::State bookmark_bar_state_;
-  DeviceAttachedIntentSource device_attached_intent_source_;
 
+  scoped_ptr<DeviceAttachedIntentSource> device_attached_intent_source_;
+
   scoped_refptr<FullscreenController> fullscreen_controller_;
 
   scoped_ptr<extensions::WindowController> extension_window_controller_;