Promotes more accessors from WmShell to Shell

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 19c7a92bdb6df789ebda3ad79131609baa0a1f76..f965c35801b3bc3a9a97414080bef4ff0e0fbbe0 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -159,7 +159,7 @@ class WindowSelectorTest : public test::AshTestBase {
   }
 
   WindowSelectorController* window_selector_controller() {
-    return WmShell::Get()->window_selector_controller();
+    return Shell::Get()->window_selector_controller();
   }
 
   WindowSelector* window_selector() {