linux: Remove dead code on accessing window tree host.

atom/browser/native_window_views.cc

@@ -28,8 +28,6 @@
 #if defined(USE_X11)
 #include "atom/browser/ui/views/global_menu_bar_x11.h"
 #include "atom/browser/ui/views/linux_frame_view.h"
-#include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
-#include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 #endif
 
 namespace atom {
@@ -74,15 +72,6 @@ NativeWindowViews::NativeWindowViews(content::WebContents* web_contents,
   params.top_level = true;
   params.remove_standard_frame = true;
 
-#if defined(USE_X11)
-  // Expose DesktopWindowTreeHostX11 for GlobalMenuBarX11.
-  params.native_widget = new views::DesktopNativeWidgetAura(window_.get());
-  host_ = new views::DesktopWindowTreeHostX11(
-      window_.get(),
-      static_cast<views::DesktopNativeWidgetAura*>(params.native_widget));
-  params.desktop_window_tree_host = host_;
-#endif
-
   bool skip_taskbar = false;
   if (options.Get(switches::kSkipTaskbar, &skip_taskbar) && skip_taskbar)
     params.type = views::Widget::InitParams::TYPE_BUBBLE;

atom/browser/native_window_views.h

@@ -15,7 +15,6 @@
 #include "ui/views/widget/widget_observer.h"
 
 namespace views {
-class DesktopWindowTreeHostX11;
 class UnhandledKeyboardEventHandler;
 class Widget;
 }
@@ -75,10 +74,6 @@ class NativeWindowViews : public NativeWindow,
   SkRegion* draggable_region() const { return draggable_region_.get(); }
   views::Widget* widget() const { return window_.get(); }
 
-#if defined(USE_X11)
-  views::DesktopWindowTreeHostX11* host() const { return host_; }
-#endif
-
  private:
   // NativeWindow:
   virtual void UpdateDraggableRegions(
@@ -122,7 +117,6 @@ class NativeWindowViews : public NativeWindow,
   views::View* web_view_;  // Managed by inspectable_web_contents_.
 
 #if defined(USE_X11)
-  views::DesktopWindowTreeHostX11* host_;  // Managed by native_widget.
   scoped_ptr<GlobalMenuBarX11> global_menu_bar_;
 #endif