Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 770 matching lines @@
 
 bool DesktopNativeWidgetAura::IsVisible() const {
   return content_window_ && desktop_window_tree_host_->IsVisible();
 }
 
 void DesktopNativeWidgetAura::Activate() {
   if (content_window_)
     desktop_window_tree_host_->Activate();
 }
 
+void DesktopNativeWidgetAura::ActivateForUserGesture() {
+  if (content_window_)
+    desktop_window_tree_host_->ActivateForUserGesture();
+}
+
 void DesktopNativeWidgetAura::Deactivate() {
   if (content_window_)
     desktop_window_tree_host_->Deactivate();
 }
 
 bool DesktopNativeWidgetAura::IsActive() const {
   return content_window_ && desktop_window_tree_host_->IsActive();
 }
 
 void DesktopNativeWidgetAura::SetAlwaysOnTop(bool always_on_top) {
@@ skipping 444 matching lines @@
   if (cursor_reference_count_ == 0) {
     // We are the last DesktopNativeWidgetAura instance, and we are responsible
     // for cleaning up |cursor_manager_|.
     delete cursor_manager_;
     native_cursor_manager_ = NULL;
     cursor_manager_ = NULL;
   }
 }
 
 }  // namespace views