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

ui/views/test/widget_event_generator_aura.cc

+// Copyright 2014 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 "ui/views/test/widget_event_generator.h"
+
+#include "ui/aura/window.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+namespace test {
+
+WidgetEventGenerator::WidgetEventGenerator(Widget* widget)
+    : aura::test::EventGenerator(widget->GetNativeView()->GetRootWindow()) {
+}
+
+WidgetEventGenerator::WidgetEventGenerator(gfx::NativeView context)
+    : aura::test::EventGenerator(context) {
+}
+
+WidgetEventGenerator::WidgetEventGenerator(
+    gfx::NativeView context,
+    Widget* window_for_initial_location)
+    : aura::test::EventGenerator(
+          context, window_for_initial_location->GetNativeWindow()) {
+}
+
+WidgetEventGenerator::~WidgetEventGenerator() {
+}
+
+}  // namespace views
+}  // namespace test