Refactoring the ownership of ui::InputMethod.

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index 94d4b1ba2f2a480ba90bcf89f8f77d58a0114d7f..24b82e3ae83e7dff62ddb9cefe31b6398a25f223 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -43,7 +43,6 @@ class X11WindowEventFilter;
 class VIEWS_EXPORT DesktopWindowTreeHostX11
     : public DesktopWindowTreeHost,
       public aura::WindowTreeHost,
-      public ui::EventSource,
       public ui::PlatformEventDispatcher {
  public:
   DesktopWindowTreeHostX11(
@@ -162,9 +161,6 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   void MoveCursorToNative(const gfx::Point& location) override;
   void OnCursorVisibilityChangedNative(bool show) override;
 
-  // Overridden frm ui::EventSource
-  ui::EventProcessor* GetEventProcessor() override;
-
  private:
   friend class DesktopWindowTreeHostX11HighDPITest;
   // Initializes our X11 surface to draw on. This method performs all