[Mac]Port browser_keyevents_browsertest.cc and browser_focus_uitest.cc to Mac.

chrome/test/ui_test_utils_win.cc

Index: chrome/test/ui_test_utils_win.cc
diff --git a/chrome/test/ui_test_utils_win.cc b/chrome/test/ui_test_utils_win.cc
index 22fa003b418bc5a4c10560ababf48a49b59ee35a..8c45ee3fc38e9117741e42b719f14316d7d6dedf 100644
--- a/chrome/test/ui_test_utils_win.cc
+++ b/chrome/test/ui_test_utils_win.cc
@@ -39,4 +39,16 @@ void ClickOnView(const Browser* browser, ViewID vid) {
   RunMessageLoop();
 }
 
+void HideNativeWindow(gfx::NativeWindow window) {
+  // TODO(jcampan): retrieve the WidgetWin and show/hide on it instead of
+  // using Windows API.
+  ::ShowWindow(window, SW_HIDE);
+}
+
+void ShowAndFocusNativeWindow(gfx::NativeWindow window) {
+  // TODO(jcampan): retrieve the WidgetWin and show/hide on it instead of
+  // using Windows API.
+  ::ShowWindow(window, SW_SHOW);
+}
+
 }  // namespace ui_test_utils