Plumb manifest fetching through WebTestDelegate interface

content/shell/renderer/layout_test/blink_test_runner.h

 // 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.
 
 #ifndef CONTENT_SHELL_RENDERER_LAYOUT_TEST_BLINK_TEST_RUNNER_H_
 #define CONTENT_SHELL_RENDERER_LAYOUT_TEST_BLINK_TEST_RUNNER_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 91 matching lines @@
   void TestFinished() override;
   void CloseRemainingWindows() override;
   void DeleteAllCookies() override;
   int NavigationEntryCount() override;
   void GoToOffset(int offset) override;
   void Reload() override;
   void LoadURLForFrame(const blink::WebURL& url,
                        const std::string& frame_name) override;
   bool AllowExternalPages() override;
   std::string DumpHistoryForWindow(WebTestProxyBase* proxy) override;
+  void FetchManifest(
+      blink::WebView* view,
+      const GURL& url,
+      const base::Callback<void(const blink::WebURLResponse& response,
+                                const std::string& data)>& callback) override;
   void SetPermission(const std::string& name,
                      const std::string& value,
                      const GURL& origin,
                      const GURL& embedding_origin) override;
   void ResetPermissions() override;
   blink::WebLayer* InstantiateWebLayer(
       scoped_refptr<cc::TextureLayer> layer) override;
   cc::SharedBitmapManager* GetSharedBitmapManager() override;
 
   void Reset();
@@ skipping 38 matching lines @@
 
   scoped_ptr<LeakDetector> leak_detector_;
   bool needs_leak_detector_;
 
   DISALLOW_COPY_AND_ASSIGN(BlinkTestRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_LAYOUT_TEST_BLINK_TEST_RUNNER_H_