Enable the FocusController on DesktopAura too.

ui/views/widget/desktop_aura/desktop_root_window_host_linux.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_root_window_host_linux.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
 #include "base/message_pump_aurax11.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/default_capture_client.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/client/user_action_client.h"
 #include "ui/aura/focus_manager.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window_property.h"
 #include "ui/base/events/event_utils.h"
 #include "ui/base/touch/touch_factory.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/corewm/compound_event_filter.h"
+#include "ui/views/corewm/corewm_switches.h"
+#include "ui/views/corewm/focus_controller.h"
 #include "ui/views/ime/input_method.h"
 #include "ui/views/widget/desktop_aura/desktop_activation_client.h"
 #include "ui/views/widget/desktop_aura/desktop_cursor_client.h"
 #include "ui/views/widget/desktop_aura/desktop_dispatcher_client.h"
+#include "ui/views/widget/desktop_aura/desktop_focus_rules.h"
 #include "ui/views/widget/desktop_aura/desktop_layout_manager.h"
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 #include "ui/views/widget/desktop_aura/desktop_screen_position_client.h"
 #include "ui/views/widget/desktop_aura/x11_desktop_handler.h"
 #include "ui/views/widget/desktop_aura/x11_desktop_window_move_client.h"
 #include "ui/views/widget/desktop_aura/x11_window_event_filter.h"
 
 namespace views {
 
 DesktopRootWindowHostLinux* DesktopRootWindowHostLinux::g_current_capture =
@@ skipping 44 matching lines @@
       atom_cache_(xdisplay_, kAtomsToCache),
       window_mapped_(false),
       focus_when_shown_(false),
       current_cursor_(ui::kCursorNull),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura) {
 }
 
 DesktopRootWindowHostLinux::~DesktopRootWindowHostLinux() {
   root_window_->ClearProperty(kHostForRootWindow);
+  if (corewm::UseFocusControllerOnDesktop()) {
+    aura::client::SetFocusClient(root_window_, NULL);
+    aura::client::SetActivationClient(root_window_, NULL);
+  }
 }
 
 // static
 ui::NativeTheme* DesktopRootWindowHost::GetNativeTheme(aura::Window* window) {
   return ui::NativeTheme::instance();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostLinux, private:
 
@@ skipping 103 matching lines @@
 
   native_widget_delegate_->OnNativeWidgetCreated();
 
   capture_client_.reset(new aura::client::DefaultCaptureClient(root_window_));
   aura::client::SetCaptureClient(root_window_, capture_client_.get());
 
   // Ensure that the X11DesktopHandler exists so that it dispatches activation
   // messages to us.
   X11DesktopHandler::get();
 
-  focus_client_.reset(new aura::FocusManager);
-  aura::client::SetFocusClient(root_window_, focus_client_.get());
-
-  activation_client_.reset(new DesktopActivationClient(root_window_));
+  if (corewm::UseFocusControllerOnDesktop()) {
+    corewm::FocusController* focus_controller =
+        new corewm::FocusController(new DesktopFocusRules);
+    focus_client_.reset(focus_controller);
+    aura::client::SetFocusClient(root_window_, focus_controller);
+    aura::client::SetActivationClient(root_window_, focus_controller);
+    root_window_->AddPreTargetHandler(focus_controller);
+  } else {
+    focus_client_.reset(new aura::FocusManager);
+    aura::client::SetFocusClient(root_window_, focus_client_.get());
+    activation_client_.reset(new DesktopActivationClient(root_window_));
+  }
 
   dispatcher_client_.reset(new DesktopDispatcherClient);
   aura::client::SetDispatcherClient(root_window_,
                                     dispatcher_client_.get());
 
   cursor_client_.reset(new DesktopCursorClient(root_window_));
   aura::client::SetCursorClient(root_window_,
                                 cursor_client_.get());
 
   position_client_.reset(new DesktopScreenPositionClient);
@@ skipping 847 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostLinux(native_widget_delegate,
                                         desktop_native_widget_aura,
                                         initial_bounds);
 }
 
 }  // namespace views