Focus launcher if spoken feedback is enabled and no other windows visible.

ash/launcher/launcher_unittest.cc

Index: ash/launcher/launcher_unittest.cc
diff --git a/ash/launcher/launcher_unittest.cc b/ash/launcher/launcher_unittest.cc
index 2c3f8a847eeaa6eb384bb36ac513d0e08682ba6d..ea9135b143486bff3c905575c019077d6f9ea776 100644
--- a/ash/launcher/launcher_unittest.cc
+++ b/ash/launcher/launcher_unittest.cc
@@ -10,6 +10,7 @@
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/launcher_view_test_api.h"
+#include "ash/wm/window_util.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
@@ -77,4 +78,18 @@ TEST_F(LauncherTest, OpenBrowser) {
   ASSERT_EQ(--button_count, test.GetButtonCount());
 }
 
+// Launcher can't be activated on mouse click, but it is activable from
+// the focus cycler or as fallback.
+TEST_F(LauncherTest, ActivateAsFallback) {
+  Launcher* launcher = Launcher::ForPrimaryDisplay();
+  views::Widget* launcher_widget = launcher->widget();
+  EXPECT_FALSE(launcher_widget->CanActivate());
+
+  launcher->WillActivateAsFallback();
+  EXPECT_TRUE(launcher_widget->CanActivate());
+
+  wm::ActivateWindow(launcher_widget->GetNativeWindow());
+  EXPECT_FALSE(launcher_widget->CanActivate());
+}
+
 }  // namespace ash