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

net/base/network_delegate_impl.h

Index: net/base/network_delegate_impl.h
diff --git a/net/base/network_delegate_impl.h b/net/base/network_delegate_impl.h
index b2d56c770d5d802960ee2bf520162acd32115951..b62f22579f5a98ac83bd9a790c1c3fe9097973f4 100644
--- a/net/base/network_delegate_impl.h
+++ b/net/base/network_delegate_impl.h
@@ -104,6 +104,9 @@ class NET_EXPORT NetworkDelegateImpl : public NetworkDelegate {
   void OnBeforeRedirect(URLRequest* request, const GURL& new_location) override;
 
   // This corresponds to URLRequestDelegate::OnResponseStarted.
+  void OnResponseStarted(URLRequest* request, int net_error) override;
+  // Deprecated.
+  // TODO(maksims): Remove this;
   void OnResponseStarted(URLRequest* request) override;
 
   // Called when bytes are received from the network, such as after receiving
@@ -129,6 +132,9 @@ class NET_EXPORT NetworkDelegateImpl : public NetworkDelegate {
   // Indicates that the URL request has been completed or failed.
   // |started| indicates whether the request has been started. If false,
   // some information like the socket address is not available.
+  void OnCompleted(URLRequest* request, bool started, int net_error) override;
+  // Deprecated.
+  // TODO(maksims): Remove this;
   void OnCompleted(URLRequest* request, bool started) override;
 
   // Called when an URLRequest is being destroyed. Note that the request is