MacViews: Implement capture using NSEvent local+global monitors

ui/views/widget/widget_interactive_uitest.cc

Index: ui/views/widget/widget_interactive_uitest.cc
diff --git a/ui/views/widget/widget_interactive_uitest.cc b/ui/views/widget/widget_interactive_uitest.cc
index c37236e427ce7cb05f14b3bcf70e49b984a93b64..adb99aebab58a0a1a2f69bacd85b4e3cc7719002 100644
--- a/ui/views/widget/widget_interactive_uitest.cc
+++ b/ui/views/widget/widget_interactive_uitest.cc
@@ -990,10 +990,11 @@ TEST_F(WidgetCaptureTest, FailedCaptureRequestIsNoop) {
   EXPECT_TRUE(mouse_view2->pressed());
 }
 
-#if !defined(OS_CHROMEOS) && !defined(OS_WIN)
+#if !defined(OS_CHROMEOS) && !defined(OS_WIN) && !defined(OS_MACOSX)
 // Test that a synthetic mouse exit is sent to the widget which was handling
 // mouse events when a different widget grabs capture.
 // TODO(pkotwicz): Make test pass on CrOS and Windows.
+// TODO(tapted): Investigate for toolkit-views on Mac http;//crbug.com/441064.
 TEST_F(WidgetCaptureTest, MouseExitOnCaptureGrab) {
   Widget widget1;
   Widget::InitParams params1 =
@@ -1015,7 +1016,7 @@ TEST_F(WidgetCaptureTest, MouseExitOnCaptureGrab) {
   widget2.Show();
   widget2.SetBounds(gfx::Rect(400, 0, 300, 300));
 
-  ui::test::EventGenerator generator(widget1.GetNativeWindow());
+  ui::test::EventGenerator generator(GetContext(), widget1.GetNativeWindow());
   generator.set_current_location(gfx::Point(100, 100));
   generator.MoveMouseBy(0, 0);
 
@@ -1035,17 +1036,22 @@ namespace {
 // Widget observer which grabs capture when the widget is activated.
 class CaptureOnActivationObserver : public WidgetObserver {
  public:
-  CaptureOnActivationObserver() {
-  }
+  CaptureOnActivationObserver() : activation_observed_(false) {}
   ~CaptureOnActivationObserver() override {}
 
   // WidgetObserver:
   void OnWidgetActivationChanged(Widget* widget, bool active) override {
-    if (active)
-      widget->SetCapture(NULL);
+    if (active) {
+      widget->SetCapture(nullptr);
+      activation_observed_ = true;
+    }
   }
 
+  bool activation_observed() const { return activation_observed_; }
+
  private:
+  bool activation_observed_;
+
   DISALLOW_COPY_AND_ASSIGN(CaptureOnActivationObserver);
 };
 
@@ -1073,6 +1079,15 @@ TEST_F(WidgetCaptureTest, SetCaptureToNonToplevel) {
   child->AddObserver(&observer);
   child->Show();
 
+#if defined(OS_MACOSX) && !defined(USE_AURA)
+  // On Mac, activation is asynchronous. A single trip to the runloop should be
+  // sufficient. On Aura platforms, note that since the child widget isn't top-
+  // level, the aura window manager gets asked whether the widget is active, not
+  // the OS.
+  base::RunLoop().RunUntilIdle();
+#endif
+
+  EXPECT_TRUE(observer.activation_observed());
   EXPECT_TRUE(child->HasCapture());
 }