Added arrow key navigation to Overview Mode

ash/wm/overview/window_selector_unittest.cc

Index: ash/wm/overview/window_selector_unittest.cc
diff --git a/ash/wm/overview/window_selector_unittest.cc b/ash/wm/overview/window_selector_unittest.cc
index 028bacd816856a72a8bc493ee611552cef90ea8f..b55da0117d61ebe7161d6936ddbf59778509149b 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -1175,6 +1175,20 @@ TEST_F(WindowSelectorTest, DisplayOrientationChanged) {
     EXPECT_TRUE(root_window->bounds().Contains(
         ToEnclosingRect(GetTransformedTargetBounds(*iter))));
   }
+
+// Tests selecting a window in OM with the arrow keys.
+TEST_F(WindowSelectorTest, ArrowKeyNavigation) {
+  gfx::Rect bounds1(0, 0, 100, 100);
+  gfx::Rect bounds2(450, 450, 550, 550);
+
+  scoped_ptr<aura::Window> window1(CreateWindow(bounds1));
+  scoped_ptr<aura::Window> window2(CreateWindow(bounds1));
+  wm::ActivateWindow(window1.get());
+
+
+
+  ToggleOverview();
+
 }
 
 }  // namespace ash