MacViews: Add WidgetEventGenerator to abstract platform-specific event generation for tests.

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.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 "chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.h"
 
 #include <algorithm>
 
 #include "ash/wm/window_state.h"
 #include "base/bind.h"
@@ skipping 194 matching lines @@
   return false;
 #else
   return ash::wm::GetWindowState(browser->window()->GetNativeWindow())->
       is_dragged();
 #endif
 }
 
 }  // namespace
 
 #if defined(USE_ASH) && !defined(OS_WIN)  // TODO(win_ash)
-class ScreenEventGeneratorDelegate : public aura::test::EventGeneratorDelegate {
+class ScreenEventGeneratorDelegate
+    : public aura::test::EventGeneratorDelegateAura {
  public:
   explicit ScreenEventGeneratorDelegate(aura::Window* root_window)
       : root_window_(root_window) {}
   virtual ~ScreenEventGeneratorDelegate() {}
 
   // EventGeneratorDelegate overrides:
   virtual aura::WindowTreeHost* GetHostAt(
       const gfx::Point& point) const OVERRIDE {
     return root_window_->GetHost();
   }
@@ skipping 1977 matching lines @@
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse", "touch"));
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTestTouch,
                         ::testing::Values("touch"));
 #elif defined(USE_ASH)
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse"));
 #endif