Add HttpProtocolHandler and convert everything to use it

components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc
index e44a9c2143f12741ff1dd992fb535b39d6b1dfe8..f87aa9105ece7f5657ebc7fecb06c33946abe830 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_protocol_unittest.cc
@@ -69,7 +69,9 @@ class SimpleURLRequestInterceptor : public net::URLRequestInterceptor {
   net::URLRequestJob* MaybeInterceptRequest(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const override {
-    return net::URLRequestHttpJob::Factory(request, network_delegate, "http");
+    return new net::URLRequestHttpJob(
+        request, network_delegate,
+        request->context()->http_user_agent_settings());
   }
 };
 
@@ -118,8 +120,8 @@ class DataReductionProxyProtocolTest : public testing::Test {
         new DataReductionProxyInterceptor(
             test_context_->config(), test_context_->io_data()->config_client(),
             bypass_stats_.get(), test_context_->event_creator());
-    std::unique_ptr<net::URLRequestJobFactoryImpl> job_factory_impl(
-        new net::URLRequestJobFactoryImpl());
+    std::unique_ptr<net::URLRequestJobFactoryImpl> job_factory_impl =
+        net::URLRequestJobFactoryImpl::CreateWithHttpProtocolHandlers();
     job_factory_.reset(new net::URLRequestInterceptingJobFactory(
         std::move(job_factory_impl), base::WrapUnique(interceptor)));