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..9c10a88d6dab1a15598f0c25b7df74b68030da0e 100644
--- a/ui/views/widget/widget_interactive_uitest.cc
+++ b/ui/views/widget/widget_interactive_uitest.cc
@@ -990,11 +990,18 @@ TEST_F(WidgetCaptureTest, FailedCaptureRequestIsNoop) {
   EXPECT_TRUE(mouse_view2->pressed());
 }
 
-#if !defined(OS_CHROMEOS) && !defined(OS_WIN)
+// Regression test for http://crbug.com/382421 (Linux-Aura issue).
+// TODO(pkotwicz): Make test pass on CrOS and Windows.
+// TODO(tapted): Investigate for toolkit-views on Mac http;//crbug.com/441064.
+#if defined(OS_CHROMEOS) || defined(OS_WIN) || defined(OS_MACOSX)
+#define MAYBE_MouseExitOnCaptureGrab DISABLED_MouseExitOnCaptureGrab
+#else
+#define MAYBE_MouseExitOnCaptureGrab MouseExitOnCaptureGrab
+#endif
+
 // 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.
-TEST_F(WidgetCaptureTest, MouseExitOnCaptureGrab) {
+TEST_F(WidgetCaptureTest, MAYBE_MouseExitOnCaptureGrab) {
   Widget widget1;
   Widget::InitParams params1 =
       CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
@@ -1028,24 +1035,28 @@ TEST_F(WidgetCaptureTest, MouseExitOnCaptureGrab) {
   // in addition to the one generated by Chrome.
   EXPECT_LT(0, mouse_view1->ExitedCalls());
 }
-#endif  // !defined(OS_CHROMEOS)
 
 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 +1084,15 @@ 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());
 }