Move wm/public into wm target

ui/aura/test/aura_test_base.h

Index: ui/aura/test/aura_test_base.h
diff --git a/ui/aura/test/aura_test_base.h b/ui/aura/test/aura_test_base.h
index b9f6e7f68ce309907e9f0571264e7fe43834817d..c38b1520a4db9126ca20dacc82848a88c7c747db 100644
--- a/ui/aura/test/aura_test_base.h
+++ b/ui/aura/test/aura_test_base.h
@@ -40,6 +40,10 @@ class AuraTestBase : public testing::Test {
   // Returns whether |event| was handled.
   bool DispatchEventUsingWindowDispatcher(ui::Event* event);
 
+  // Override in derived classes to provide different specializations of
+  // AuraTestHelper.
+  virtual AuraTestHelper* CreateHelper(base::MessageLoopForUI* message_loop);
+
   Window* root_window() { return helper_->root_window(); }
   WindowTreeHost* host() { return helper_->host(); }
   ui::EventProcessor* event_processor() { return helper_->event_processor(); }