PlzNavigate: check report_raw_headers based on the main frame

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index 8a1007d4dd3d6550e05f76faa0f276bcaeedc3b5..67a17b53a8ec579a05981863fe613e76e4466df8 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -634,7 +634,8 @@ void NavigationRequest::OnStartChecksComplete(
           SchemeIs(kGuestScheme);
 
   bool report_raw_headers =
-      RenderFrameDevToolsAgentHost::IsNetworkHandlerEnabled(frame_tree_node_);
+      RenderFrameDevToolsAgentHost::IsNetworkHandlerEnabled(
+          frame_tree_node_->frame_tree()->root());

[dgozman, 2017/01/10 17:36:31]

In OOPIF world, this is not necessarily the main frame. We should instead alter
RFDTAH::IsNetworkHandlerEnabled to climb up the hierarchy. Something like this:
https://cs.chromium.org/chromium/src/content/browser/devtools/render_frame_de...

[clamy, 2017/01/11 13:47:29]

Ok I wasn't sure if I needed to take the top level frame or do a walk of the
frame tree. I've opted to add this to RenderFrameDevToolsAgentHost instead,
since this seems to be a detail of the DevTools implementation.

 
   loader_ = NavigationURLLoader::Create(
       frame_tree_node_->navigator()->GetController()->GetBrowserContext(),