Plumbing devtools agent host id and request id between processes

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index 449003595cb6682ee8416e1f9acb23e6e82e1336..d2fdecb6782b95c7279bb6a90ad49d209c44dc84 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -316,6 +316,12 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // the resulting FrameHostMsg_DidCommitProvisionalLoad message.
   int nav_entry_id;
 
+  // For browser-initiated navigations, this is the DevTools Network.requestId
+  // which will always an odd number to let us distinguish browser generated IDs
+  // from blink generated IDs (which will be even). For renderer-initiated
+  // navigations this will be zero.
+  int devtools_request_id;
+
   // Whether this is a history navigation in a newly created child frame, in
   // which case the browser process is instructing the renderer process to load
   // a URL from a session history item.  Defaults to false.