Make GetRootWindow() return a Window instead of a RootWindow.

ash/wm/workspace/workspace_event_handler_unittest.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/wm/workspace/workspace_event_handler.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_state.h"
@@ skipping 238 matching lines @@
 
 TEST_F(WorkspaceEventHandlerTest, DoubleClickCaptionTogglesMaximize) {
   aura::test::TestWindowDelegate wd;
   scoped_ptr<aura::Window> window(
       CreateTestWindow(&wd, gfx::Rect(1, 2, 30, 40)));
   window->SetProperty(aura::client::kCanMaximizeKey, true);
   wd.set_window_component(HTCAPTION);
 
   wm::WindowState* window_state = wm::GetWindowState(window.get());
   EXPECT_FALSE(window_state->IsMaximized());
-  aura::RootWindow* root = Shell::GetPrimaryRootWindow();
+  aura::Window* root = Shell::GetPrimaryRootWindow();
   aura::test::EventGenerator generator(root, window.get());
   generator.DoubleClickLeftButton();
   EXPECT_NE("1,2 30x40", window->bounds().ToString());
 
   EXPECT_TRUE(window_state->IsMaximized());
   generator.DoubleClickLeftButton();
 
   EXPECT_FALSE(window_state->IsMaximized());
   EXPECT_EQ("1,2 30x40", window->bounds().ToString());
 
   // Double-clicking the middle button shouldn't toggle the maximized state.
   WindowPropertyObserver observer(window.get());
   ui::MouseEvent press(ui::ET_MOUSE_PRESSED, generator.current_location(),
                        generator.current_location(),
                        ui::EF_MIDDLE_MOUSE_BUTTON | ui::EF_IS_DOUBLE_CLICK);
-  root->AsRootWindowHostDelegate()->OnHostMouseEvent(&press);
+  aura::WindowEventDispatcher* dispatcher = root->GetDispatcher();
+  dispatcher->AsRootWindowHostDelegate()->OnHostMouseEvent(&press);
   ui::MouseEvent release(ui::ET_MOUSE_RELEASED, generator.current_location(),
                          generator.current_location(),
                          ui::EF_IS_DOUBLE_CLICK);
-  root->AsRootWindowHostDelegate()->OnHostMouseEvent(&release);
+  dispatcher->AsRootWindowHostDelegate()->OnHostMouseEvent(&release);
 
   EXPECT_FALSE(window_state->IsMaximized());
   EXPECT_EQ("1,2 30x40", window->bounds().ToString());
   EXPECT_FALSE(observer.DidPropertyChange(aura::client::kShowStateKey));
 }
 
 TEST_F(WorkspaceEventHandlerTest, DoubleTapCaptionTogglesMaximize) {
   aura::test::TestWindowDelegate wd;
   gfx::Rect bounds(10, 20, 30, 40);
   scoped_ptr<aura::Window> window(CreateTestWindow(&wd, bounds));
@@ skipping 48 matching lines @@
   ASSERT_TRUE(aura::client::GetWindowMoveClient(window->parent()));
   base::MessageLoop::current()->DeleteSoon(FROM_HERE, window.get());
   aura::client::GetWindowMoveClient(window->parent())
       ->RunMoveLoop(window.release(),
                     gfx::Vector2d(),
                     aura::client::WINDOW_MOVE_SOURCE_MOUSE);
 }
 
 }  // namespace internal
 }  // namespace ash