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

ash/shelf/shelf_view_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/shelf/shelf_view.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 252 matching lines @@
 
   bool HasShelfIDToAppIDMapping(ShelfID id) const override { return true; }
 
   const std::string& GetAppIDForShelfID(ShelfID id) override {
     // Use |app_id_| member variable because returning a reference to local
     // variable is not allowed.
     app_id_ = base::IntToString(id);
     return app_id_;
   }
 
+  const std::string& GetLaunchIDForShelfID(ShelfID id) override {
+    return base::EmptyString();
+  }
+
   void PinAppWithID(const std::string& app_id) override { NOTREACHED(); }
 
   bool IsAppPinned(const std::string& app_id) override {
     return is_app_pinned_;
   }
 
   void UnpinAppWithID(const std::string& app_id) override { NOTREACHED(); }
 
  private:
   // Tracks whether apps are pinned or not.
@@ skipping 2876 matching lines @@
                 IsEmpty());
 
     ASSERT_TRUE(test_api_->IsShowingOverflowBubble());
   }
 }
 
 #endif  // !defined(OS_WIN)
 
 }  // namespace test
 }  // namespace ash