Make URLRequest::Read to return net errors or bytes read instead of a bool

net/url_request/url_request_file_dir_job_unittest.cc

Index: net/url_request/url_request_file_dir_job_unittest.cc
diff --git a/net/url_request/url_request_file_dir_job_unittest.cc b/net/url_request/url_request_file_dir_job_unittest.cc
index a3a077f05c49aae7ab06b735b59a074c29734a80..b23f55e26620005971a1f87140bcfff0773b2c07 100644
--- a/net/url_request/url_request_file_dir_job_unittest.cc
+++ b/net/url_request/url_request_file_dir_job_unittest.cc
@@ -82,7 +82,7 @@ class TestDirectoryURLRequestDelegate : public TestDelegate {
 
   ~TestDirectoryURLRequestDelegate() override {}
 
-  void OnResponseStarted(URLRequest* request) override {
+  void OnResponseStarted(URLRequest* request, int net_error) override {
     got_response_started_ = true;
   }