Update from https://crrev.com/304121

net/test/url_request/url_request_mock_http_job.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.
 //
 // A URLRequestJob class that pulls the net and http headers from disk.
 
 #ifndef NET_TEST_URL_REQUEST_URL_REQUEST_MOCK_HTTP_JOB_H_
 #define NET_TEST_URL_REQUEST_URL_REQUEST_MOCK_HTTP_JOB_H_
 
 #include <string>
@@ skipping 10 matching lines @@
 }
 
 namespace net {
 class URLRequestInterceptor;
 }
 
 namespace net {
 
 class URLRequestMockHTTPJob : public URLRequestFileJob {
  public:
+  enum FailurePhase {
+    START = 0,
+    READ_ASYNC = 1,
+    READ_SYNC = 2,
+    MAX_FAILURE_PHASE = 3,
+  };
+
   // Note that all file IO is done using |worker_pool|.
   URLRequestMockHTTPJob(URLRequest* request,
                         NetworkDelegate* network_delegate,
                         const base::FilePath& file_path,
                         const scoped_refptr<base::TaskRunner>& task_runner);
 
   void Start() override;
+  bool ReadRawData(IOBuffer* buf, int buf_size, int* bytes_read) override;
   bool GetMimeType(std::string* mime_type) const override;
   int GetResponseCode() const override;
   bool GetCharset(std::string* charset) override;
   void GetResponseInfo(HttpResponseInfo* info) override;
   bool IsRedirectResponse(GURL* location, int* http_status_code) override;
 
   // Adds the testing URLs to the URLRequestFilter.
   static void AddUrlHandler(
       const base::FilePath& base_path,
       const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
 
   // Respond to all HTTP requests of |hostname| with contents of the file
   // located at |file_path|.
   static void AddHostnameToFileHandler(
       const std::string& hostname,
       const base::FilePath& file,
       const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
 
   // Given the path to a file relative to the path passed to AddUrlHandler(),
   // construct a mock URL.
   static GURL GetMockUrl(const base::FilePath& path);
 
+  // Given the path to a file relative to the path passed to AddUrlHandler(),
+  // construct a mock URL that reports |net_error| at given |phase| of the
+  // request. Reporting |net_error| ERR_IO_PENDING results in a hung request.
+  static GURL GetMockUrlWithFailure(const base::FilePath& path,
+                                    FailurePhase phase,
+                                    int net_error);
+
   // Returns a URLRequestJobFactory::ProtocolHandler that serves
   // URLRequestMockHTTPJob's responding like an HTTP server. |base_path| is the
   // file path leading to the root of the directory to use as the root of the
   // HTTP server.
   static scoped_ptr<URLRequestInterceptor> CreateInterceptor(
       const base::FilePath& base_path,
       const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
 
   // Returns a URLRequestJobFactory::ProtocolHandler that serves
   // URLRequestMockHTTPJob's responding like an HTTP server. It responds to all
   // requests with the contents of |file|.
   static scoped_ptr<URLRequestInterceptor> CreateInterceptorForSingleFile(
       const base::FilePath& file,
       const scoped_refptr<base::SequencedWorkerPool>& worker_pool);
 
  protected:
   ~URLRequestMockHTTPJob() override;
 
  private:
   void GetResponseInfoConst(HttpResponseInfo* info) const;
-  void GetRawHeaders(std::string raw_headers);
+  void SetHeadersAndStart(const std::string& raw_headers);
+  // Checks query part of request url, and reports an error if it matches.
+  // Error is parsed out from the query and is reported synchronously.
+  // Reporting ERR_IO_PENDING results in a hung request.
+  // The "readasync" error is posted asynchronously.
+  bool MaybeReportErrorOnPhase(FailurePhase phase);
+
   std::string raw_headers_;
   const scoped_refptr<base::TaskRunner> task_runner_;
 
   base::WeakPtrFactory<URLRequestMockHTTPJob> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestMockHTTPJob);
 };
 
 }  // namespace net
 
 #endif  // NET_TEST_URL_REQUEST_URL_REQUEST_MOCK_HTTP_JOB_H_