Promotes more accessors from WmShell to Shell

ash/wm/gestures/overview_gesture_handler_unittest.cc

 // Copyright 2013 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/gestures/overview_gesture_handler.h"
 
 #include "ash/common/wm/overview/window_selector_controller.h"
-#include "ash/common/wm_shell.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/test/test_windows.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 class OverviewGestureHandlerTest : public test::AshTestBase {
  public:
   OverviewGestureHandlerTest() {}
   ~OverviewGestureHandlerTest() override {}
 
   aura::Window* CreateWindow(const gfx::Rect& bounds) {
     return CreateTestWindowInShellWithDelegate(&delegate_, -1, bounds);
   }
 
   void ToggleOverview() {
-    WmShell::Get()->window_selector_controller()->ToggleOverview();
+    Shell::Get()->window_selector_controller()->ToggleOverview();
   }
 
   bool IsSelecting() {
-    return WmShell::Get()->window_selector_controller()->IsSelecting();
+    return Shell::Get()->window_selector_controller()->IsSelecting();
   }
 
   float vertical_threshold_pixels() const {
     return OverviewGestureHandler::vertical_threshold_pixels_;
   }
 
   float horizontal_threshold_pixels() const {
     return OverviewGestureHandler::horizontal_threshold_pixels_;
   }
 
@@ skipping 125 matching lines @@
     generator.Dispatch(&move);
   }
 
   EXPECT_FALSE(IsSelecting());
   ui::ScrollEvent fling_start(ui::ET_SCROLL_FLING_START, start, timestamp, 0, 0,
                               10, 0, 10, num_fingers);
   generator.Dispatch(&fling_start);
 }
 
 }  // namespace ash