Add HttpProtocolHandler and convert everything to use it

net/url_request/url_request_job_factory_impl.h

Index: net/url_request/url_request_job_factory_impl.h
diff --git a/net/url_request/url_request_job_factory_impl.h b/net/url_request/url_request_job_factory_impl.h
index a0d0c490acb8485c9dff3dd35e3008f993f9ac79..bf5c031d6c453d7e060ee699b9c8c00041ac084d 100644
--- a/net/url_request/url_request_job_factory_impl.h
+++ b/net/url_request/url_request_job_factory_impl.h
@@ -23,6 +23,12 @@ class NET_EXPORT URLRequestJobFactoryImpl : public URLRequestJobFactory {
   URLRequestJobFactoryImpl();
   ~URLRequestJobFactoryImpl() override;
 
+  // Creates a URLRequestJobFactoryImpl and adds an HttpProtocolHandler for each
+  // scheme it can handle: http and https on all platforms, ws and wss for
+  // platforms other than iOS
+  static std::unique_ptr<URLRequestJobFactoryImpl>
+  CreateWithHttpProtocolHandlers();
+
   // Sets the ProtocolHandler for a scheme. Returns true on success, false on
   // failure (a ProtocolHandler already exists for |scheme|).
   bool SetProtocolHandler(const std::string& scheme,