Enhance chrome.app.window API for shelf integration with pinning support

ash/test/test_shelf_delegate.h

Index: ash/test/test_shelf_delegate.h
diff --git a/ash/test/test_shelf_delegate.h b/ash/test/test_shelf_delegate.h
index 7a5fc127a747668c1f2901d250942e677847c9b7..56aa1a135b49171d9e353a4b3bc06244d2297821 100644
--- a/ash/test/test_shelf_delegate.h
+++ b/ash/test/test_shelf_delegate.h
@@ -57,6 +57,8 @@ class TestShelfDelegate : public ShelfDelegate, public aura::WindowObserver {
   void OnShelfAutoHideStateChanged(WmShelf* shelf) override;
   void OnShelfVisibilityStateChanged(WmShelf* shelf) override;
   ShelfID GetShelfIDForAppID(const std::string& app_id) override;
+  ShelfID GetShelfIDForAppIDAndLaunchID(const std::string& app_id,
+                                        const std::string& launch_id) override;
   bool HasShelfIDToAppIDMapping(ShelfID id) const override;
   const std::string& GetAppIDForShelfID(ShelfID id) override;
   void PinAppWithID(const std::string& app_id) override;