Support Drag and Drop across displays.

ash/shell.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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 403 matching lines @@
       new internal::RootWindowController(root_window);
   root_window_controller->CreateContainers();
 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
 
   if (command_line->HasSwitch(switches::kAshTouchHud)) {
     touch_observer_hud_.reset(new internal::TouchObserverHUD);
     AddEnvEventFilter(touch_observer_hud_.get());
   }
 
+  if (internal::DisplayController::IsExtendedDesktopEnabled()) {
+    mouse_cursor_filter_.reset(
+        new internal::MouseCursorEventFilter(display_controller_.get()));
+    AddEnvEventFilter(mouse_cursor_filter_.get());
+  }
+
   // Create Controllers that may need root window.
   // TODO(oshima): Move as many controllers before creating
   // RootWindowController as possible.
   stacking_controller_.reset(new internal::StackingController);
   visibility_controller_.reset(new internal::VisibilityController);
   drag_drop_controller_.reset(new internal::DragDropController);
   if (delegate_.get())
     user_action_client_.reset(delegate_->CreateUserActionClient());
   window_modality_controller_.reset(new internal::WindowModalityController);
   AddEnvEventFilter(window_modality_controller_.get());
 
   magnification_controller_.reset(
       internal::MagnificationController::CreateInstance());
 
-  if (internal::DisplayController::IsExtendedDesktopEnabled()) {
-    mouse_cursor_filter_.reset(
-        new internal::MouseCursorEventFilter(display_controller_.get()));
-    AddEnvEventFilter(mouse_cursor_filter_.get());
-  }
-
   high_contrast_controller_.reset(new HighContrastController);
   video_detector_.reset(new VideoDetector);
   window_cycle_controller_.reset(
       new WindowCycleController(activation_controller_.get()));
 
   tooltip_controller_.reset(new internal::TooltipController(
       drag_drop_controller_.get()));
   AddEnvEventFilter(tooltip_controller_.get());
 
   InitRootWindowController(root_window_controller);
@@ skipping 325 matching lines @@
 }
 
 void Shell::ShowCursor(bool visible) {
   RootWindowList root_windows = GetAllRootWindows();
   for (RootWindowList::iterator iter = root_windows.begin();
        iter != root_windows.end(); ++iter)
     (*iter)->ShowCursor(visible);
 }
 
 }  // namespace ash