Renderer-side changes for NoState Prefetch

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 11fd9c54a74b045e7ae339dc5575504e89986da3..ed48c1b3c5992bec31eea93e0f0e3b3353f0745b 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -486,9 +486,12 @@ void ChromeContentRendererClient::RenderFrameCreated(
   } else {
     // Avoid any race conditions from having the browser tell subframes that
     // they're prerendering.
-    if (prerender::PrerenderHelper::IsPrerendering(
-            render_frame->GetRenderView()->GetMainRenderFrame())) {
-      new prerender::PrerenderHelper(render_frame);
+    RenderFrame* main_frame =

[Charlie Harrison, 2016/08/03 14:40:03]

Optional: It might make sense to hide some of this logic into
PrerendererHelper's constructor (i.e. getting the mode) to simplify construction
sites.

[droger, 2016/08/03 16:45:50]

Done.

+        render_frame->GetRenderView()->GetMainRenderFrame();
+    if (prerender::PrerenderHelper::IsPrerendering(main_frame)) {
+      new prerender::PrerenderHelper(
+          render_frame,
+          prerender::PrerenderHelper::GetPrerenderMode(main_frame));
     }
   }