Plumbing devtools agent host id and request id between processes

third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
index 8e5e6300b6be015c31da61526d4b5e564f4c9367..08c6696aaa15ea12ea311707513e5be03fd43a17 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
@@ -700,11 +700,18 @@ void InspectorNetworkAgent::WillSendRequest(
   WillSendRequestInternal(frame, identifier, loader, request, redirect_response,
                           initiator_info);
 
-  if (!host_id_.IsEmpty())
+  request.SetDevToolsAgentHostId(host_id_);
+  request.SetDevToolsRequestId(IdentifiersFactory::RequestId(identifier));
+
+  if (!host_id_.IsEmpty()) {
+    // TODO(alexclarke): Merge throttling in with request interception so we can
+    // stop setting this header.
     request.AddHTTPHeaderField(
         HTTPNames::X_DevTools_Emulate_Network_Conditions_Client_Id,
         AtomicString(host_id_));
+  }
 
+  // TODO(alexclarke): Remove this.
   request.SetHTTPHeaderField(
       HTTPNames::X_DevTools_Request_Id,
       AtomicString(IdentifiersFactory::RequestId(identifier)));