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

chrome/test/ui_test_utils.h

Index: chrome/test/ui_test_utils.h
diff --git a/chrome/test/ui_test_utils.h b/chrome/test/ui_test_utils.h
index d852e57c31ac34ae677c2d5f1506f25499f30d21..8d3052f98ec048af9acfb686841fd758184a5767 100644
--- a/chrome/test/ui_test_utils.h
+++ b/chrome/test/ui_test_utils.h
@@ -9,6 +9,7 @@
 #include <string>
 #include <set>
 
+#include "gfx/native_widget_types.h"
 #include "base/basictypes.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
@@ -416,6 +417,12 @@ class WindowedNotificationObserverWithDetails
   DISALLOW_COPY_AND_ASSIGN(WindowedNotificationObserverWithDetails);
 };
 
+// Hide a native window.
+void HideNativeWindow(gfx::NativeWindow window);
+
+// Show and focus a native window.
+void ShowAndFocusNativeWindow(gfx::NativeWindow window);
+
 }  // namespace ui_test_utils
 
 #endif  // CHROME_TEST_UI_TEST_UTILS_H_