Fixes for turning on offliner request.

chrome/browser/android/offline_pages/prerendering_offliner_unittest.cc

 // Copyright 2016 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 "chrome/browser/android/offline_pages/prerendering_offliner.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/run_loop.h"
@@ skipping 18 matching lines @@
 // Mock Loader for testing the Offliner calls.
 class MockPrerenderingLoader : public PrerenderingLoader {
  public:
   explicit MockPrerenderingLoader(content::BrowserContext* browser_context)
       : PrerenderingLoader(browser_context),
         can_prerender_(true),
         mock_loading_(false),
         mock_loaded_(false) {}
   ~MockPrerenderingLoader() override {}
 
-  bool LoadPage(const GURL& url, const LoadPageCallback& callback) override {
+  bool LoadPage(const GURL& url, LoadPageCallback callback) override {
     mock_loading_ = true;
     load_page_callback_ = callback;
     return mock_loading_;
   }
 
   void StopLoading() override {
     mock_loading_ = false;
     mock_loaded_ = false;
   }
 
@@ skipping 272 matching lines @@
   loader()->CompleteLoadingAsCanceled();
   PumpLoop();
   EXPECT_TRUE(completion_callback_called());
   EXPECT_EQ(Offliner::RequestStatus::CANCELED, request_status());
   EXPECT_FALSE(loader()->IsLoaded());
   // Note: save still in progress since it does not support canceling.
   EXPECT_TRUE(SaveInProgress());
 }
 
 }  // namespace offline_pages