Add unit tests for RedirectToFileResourceHandler.

content/browser/loader/test_resource_handler.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 "content/browser/loader/test_resource_handler.h"
 
 #include "base/logging.h"
 #include "content/browser/loader/resource_controller.h"
 #include "content/public/common/resource_response.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 184 matching lines @@
   *defer = defer_on_response_completed_;
   defer_on_response_completed_ = false;
 
   if (*defer)
     deferred_run_loop_->Quit();
   response_complete_run_loop_.Quit();
 }
 
 void TestResourceHandler::OnDataDownloaded(int bytes_downloaded) {
   EXPECT_TRUE(expect_on_data_downloaded_);
+  EXPECT_EQ(1, on_will_start_called_);
+  EXPECT_EQ(1, on_response_started_called_);
+  EXPECT_EQ(0, on_response_completed_called_);
+
   total_bytes_downloaded_ += bytes_downloaded;
 }
 
 void TestResourceHandler::Resume() {
   ScopedCallDepthTracker call_depth_tracker(&call_depth_);
   controller_->Resume();
 }
 
 void TestResourceHandler::CancelWithError(net::Error net_error) {
   ScopedCallDepthTracker call_depth_tracker(&call_depth_);
@@ skipping 14 matching lines @@
 
 void TestResourceHandler::WaitUntilResponseComplete() {
   response_complete_run_loop_.Run();
 }
 
 base::WeakPtr<TestResourceHandler> TestResourceHandler::GetWeakPtr() {
   return weak_ptr_factory_.GetWeakPtr();
 }
 
 }  // namespace content