Refactors MultiWindowResizeController to use ash/wm/common

ash/wm/aura/wm_root_window_controller_aura.cc

 // Copyright 2016 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/wm/aura/wm_root_window_controller_aura.h"
 
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/wm/aura/wm_globals_aura.h"
 #include "ash/wm/aura/wm_shelf_aura.h"
 #include "ash/wm/aura/wm_window_aura.h"
 #include "ash/wm/common/wm_root_window_controller_observer.h"
 #include "ash/wm/workspace_controller.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
+#include "ui/events/event_targeter.h"
+#include "ui/events/event_utils.h"
 
 DECLARE_WINDOW_PROPERTY_TYPE(ash::wm::WmRootWindowControllerAura*);
 
 namespace ash {
 namespace wm {
 
 // TODO(sky): it likely makes more sense to hang this off RootWindowSettings.
 DEFINE_OWNED_WINDOW_PROPERTY_KEY(ash::wm::WmRootWindowControllerAura,
                                  kWmRootWindowControllerKey,
                                  nullptr);
@@ skipping 65 matching lines @@
 }
 
 void WmRootWindowControllerAura::ConfigureWidgetInitParamsForContainer(
     views::Widget* widget,
     int shell_container_id,
     views::Widget::InitParams* init_params) {
   init_params->parent = Shell::GetContainer(
       root_window_controller_->GetRootWindow(), shell_container_id);
 }
 
+WmWindow* WmRootWindowControllerAura::FindEventTarget(
+    const gfx::Point& location_in_screen) {
+  gfx::Point location_in_root =
+      GetWindow()->ConvertPointFromScreen(location_in_screen);
+  aura::Window* root = root_window_controller_->GetRootWindow();
+  ui::MouseEvent test_event(ui::ET_MOUSE_MOVED, location_in_root,
+                            location_in_root, ui::EventTimeForNow(),
+                            ui::EF_NONE, ui::EF_NONE);
+  ui::EventTarget* event_handler = static_cast<ui::EventTarget*>(root)
+                                       ->GetEventTargeter()
+                                       ->FindTargetForEvent(root, &test_event);
+  return WmWindowAura::Get(static_cast<aura::Window*>(event_handler));
+}
+
 void WmRootWindowControllerAura::AddObserver(
     WmRootWindowControllerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void WmRootWindowControllerAura::RemoveObserver(
     WmRootWindowControllerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
@@ skipping 16 matching lines @@
     aura::Window* root_window) {
   if (root_window != root_window_controller_->GetRootWindow())
     return;
 
   FOR_EACH_OBSERVER(WmRootWindowControllerObserver, observers_,
                     OnShelfAlignmentChanged());
 }
 
 }  // namespace wm
 }  // namespace ash