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 1b65eff9263a0190f1aa1a970e2aceae451b58fc..0dfba094e41ef328b938c6e4c8734fd691f05e18 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -16,6 +16,7 @@
 #include "ash/test/shell_test_api.h"
 #include "ash/test/test_shelf_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
+#include "ash/wm/overview/window_grid.h"
 #include "ash/wm/overview/window_selector.h"
 #include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm/overview/window_selector_item.h"
@@ -164,9 +165,9 @@ class WindowSelectorTest : public test::AshTestBase {
         Shell::GetPrimaryRootWindow())->GetFocusedWindow();
     }
 
-  ScopedVector<WindowSelectorItem>* GetWindowItems() {
-    return &(ash::Shell::GetInstance()->window_selector_controller()->
-        window_selector_->windows_);
+  const std::vector<WindowSelectorItem*>& GetWindowItemsForRoot(int index) {
+    return ash::Shell::GetInstance()->window_selector_controller()->
+        window_selector_->grid_list_[index]->window_list();
     }
 
   views::Widget* GetLabelWidget(ash::WindowSelectorItem* window) {
@@ -699,7 +700,7 @@ TEST_F(WindowSelectorTest, CreateLabelUnderWindow) {
   base::string16 window_title = base::UTF8ToUTF16("My window");
   window->set_title(window_title);
   ToggleOverview();
-  WindowSelectorItem* window_item = GetWindowItems()->back();
+  WindowSelectorItem* window_item = GetWindowItemsForRoot(0).back();
   views::Widget* widget = GetLabelWidget(window_item);
   // Has the label widget been created?
   ASSERT_TRUE(widget);
@@ -728,7 +729,7 @@ TEST_F(WindowSelectorTest, CreateLabelUnderPanel) {
   panel2->set_title(panel2_title);
   wm::ActivateWindow(panel1.get());
   ToggleOverview();
-  WindowSelectorItem* window_item = GetWindowItems()->back();
+  WindowSelectorItem* window_item = GetWindowItemsForRoot(0).back();
   views::Widget* widget = GetLabelWidget(window_item);
   // Has the label widget been created?
   ASSERT_TRUE(widget);