Window prerequisites for ShelfWindowWatcher panel support.

ash/aura/wm_window_aura.h

Index: ash/aura/wm_window_aura.h
diff --git a/ash/aura/wm_window_aura.h b/ash/aura/wm_window_aura.h
index 503a60e2fa02eb6aa88cc8701b7eb58c7ad9e8e8..9bc3699dd5cb56355d5d9555c1b075649d935702 100644
--- a/ash/aura/wm_window_aura.h
+++ b/ash/aura/wm_window_aura.h
@@ -88,6 +88,11 @@ class ASH_EXPORT WmWindowAura : public WmWindow,
   void SetColorProperty(WmWindowProperty key, SkColor value) override;
   int GetIntProperty(WmWindowProperty key) override;
   void SetIntProperty(WmWindowProperty key, int value) override;
+  std::string GetStringProperty(WmWindowProperty key) override;
+  void SetStringProperty(WmWindowProperty key,
+                         const std::string& value) override;
+  gfx::ImageSkia GetWindowIcon() override;
+  gfx::ImageSkia GetAppIcon() override;
   const wm::WindowState* GetWindowState() const override;
   WmWindow* GetToplevelWindow() override;
   WmWindow* GetToplevelWindowForFocus() override;
@@ -98,6 +103,7 @@ class ASH_EXPORT WmWindowAura : public WmWindow,
   const WmWindow* GetParent() const override;
   const WmWindow* GetTransientParent() const override;
   std::vector<WmWindow*> GetTransientChildren() override;
+  bool MoveToEventRoot(const ui::Event& event) override;
   void SetLayoutManager(
       std::unique_ptr<WmLayoutManager> layout_manager) override;
   WmLayoutManager* GetLayoutManager() override;