views/mus: Run some more tests from views_unittests in mus.

ui/views/focus/focus_manager_unittest.cc

Index: ui/views/focus/focus_manager_unittest.cc
diff --git a/ui/views/focus/focus_manager_unittest.cc b/ui/views/focus/focus_manager_unittest.cc
index c37b77f2822b2796db40ec207131b69bf8799bc4..755c141441861556b6defde5271c117a0e834ab9 100644
--- a/ui/views/focus/focus_manager_unittest.cc
+++ b/ui/views/focus/focus_manager_unittest.cc
@@ -123,6 +123,9 @@ TEST_F(FocusManagerTest, FocusChangeListener) {
 }
 
 TEST_F(FocusManagerTest, WidgetFocusChangeListener) {
+  // SimulateNativeActive() doesn't work correctly in mus.

[sky, 2016/06/08 04:25:02]

I recommend NOTIMPLEMENTEDs and filing bugs for all things that should work.
Otherwise we're going to forget them.

[sadrul, 2016/06/08 14:57:42]

Ended up fixing this particular test in
https://codereview.chromium.org/2049723002/

I have avoided adding NOTIMPLEMENTED()s in other places, since they add too much
noise in the tests. But I believe I have filed bugs tracking the rest of the
things that do not currently work in mus.

+  if (IsMus())
+    return;
   // First, ensure the simulator is aware of the Widget created in SetUp() being
   // currently active.
   test::WidgetTest::SimulateNativeActivate(GetWidget());
@@ -866,6 +869,9 @@ class AdvanceFocusWidgetDelegate : public WidgetDelegate {
 
 // Verifies focus wrapping happens in the same widget.
 TEST_F(FocusManagerTest, AdvanceFocusStaysInWidget) {
+  // Mus doesn't support child Widgets well yet. https://crbug.com/612820
+  if (IsMus())
+    return;
   // Add |widget_view| as a child of the Widget.
   View* widget_view = new View;
   widget_view->SetFocusBehavior(View::FocusBehavior::ALWAYS);