aura: Remove client::UserActionClient.

chrome/browser/ui/views/frame/desktop_browser_frame_aura.h

Index: chrome/browser/ui/views/frame/desktop_browser_frame_aura.h
diff --git a/chrome/browser/ui/views/frame/desktop_browser_frame_aura.h b/chrome/browser/ui/views/frame/desktop_browser_frame_aura.h
index edaf381ea9cd49df2ce03e1bdc6753686579f77d..ec782b913f23a4c168a28d0097e58391edf379c0 100644
--- a/chrome/browser/ui/views/frame/desktop_browser_frame_aura.h
+++ b/chrome/browser/ui/views/frame/desktop_browser_frame_aura.h
@@ -15,12 +15,6 @@ class BrowserDesktopWindowTreeHost;
 class BrowserFrame;
 class BrowserView;
 
-namespace aura {
-namespace client {
-class UserActionClient;
-}
-}
-
 namespace views {
 namespace corewm {
 class VisibilityController;
@@ -63,7 +57,6 @@ class DesktopBrowserFrameAura : public views::DesktopNativeWidgetAura,
   // Owned by the RootWindow.
   BrowserDesktopWindowTreeHost* browser_desktop_window_tree_host_;
 
-  scoped_ptr<aura::client::UserActionClient> user_action_client_;
   scoped_ptr<views::corewm::VisibilityController> visibility_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopBrowserFrameAura);