Update from https://crrev.com/304121

net/test/url_request/url_request_mock_http_job.h

Index: net/test/url_request/url_request_mock_http_job.h
diff --git a/net/test/url_request/url_request_mock_http_job.h b/net/test/url_request/url_request_mock_http_job.h
index 1a01a3084be2b9f6e847d2d2b0683ff080c14507..6eb3c72b86199aeeba02342344b0fbf39f8c1f50 100644
--- a/net/test/url_request/url_request_mock_http_job.h
+++ b/net/test/url_request/url_request_mock_http_job.h
@@ -28,6 +28,13 @@ 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,
@@ -35,6 +42,7 @@ class URLRequestMockHTTPJob : public URLRequestFileJob {
                         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;
@@ -57,6 +65,13 @@ class URLRequestMockHTTPJob : public URLRequestFileJob {
   // 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
@@ -77,7 +92,13 @@ class URLRequestMockHTTPJob : public URLRequestFileJob {
 
  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_;