Get signals working in the EXTRA_DATA section of MHTML

chrome/browser/android/offline_pages/background_loader_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/background_loader_offliner.h"
 
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "base/test/histogram_tester.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 22 matching lines @@
 const bool kUserRequested = true;
 
 // Mock OfflinePageModel for testing the SavePage calls
 class MockOfflinePageModel : public StubOfflinePageModel {
  public:
   MockOfflinePageModel() : mock_saving_(false) {}
   ~MockOfflinePageModel() override {}
 
   void SavePage(const SavePageParams& save_page_params,
                 std::unique_ptr<OfflinePageArchiver> archiver,
+                const std::vector<std::string>& signal_data,
                 const SavePageCallback& callback) override {
     mock_saving_ = true;
     save_page_callback_ = callback;
   }
 
   void CompleteSavingAsArchiveCreationFailed() {
     DCHECK(mock_saving_);
     mock_saving_ = false;
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(save_page_callback_,
@@ skipping 281 matching lines @@
   SavePageRequest request(kRequestId, kHttpUrl, kClientId, creation_time,
                           kUserRequested);
   EXPECT_TRUE(offliner()->LoadAndSave(request, callback()));
   offliner()->WebContentsDestroyed();
 
   EXPECT_TRUE(completion_callback_called());
   EXPECT_EQ(Offliner::RequestStatus::LOADING_FAILED, request_status());
 }
 
 }  // namespace offline_pages