PlzNavigate: Create the speculative renderer earlier.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 0ca09489607151bcbed660dfeaf7b5b65bc44dde..73322deaf2cb0fb4b2c2844ca2d0d6669cc8a681 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -346,6 +346,11 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // PlzNavigate: this call happens on all browser-initiated navigations.
   void DispatchBeforeUnload(bool for_navigation);
 
+  // Returns true if a call to DispatchBeforeUnload will actually send the
+  // beforeunload IPC. This will not be the case if the current renderer it not

[clamy, 2015/06/09 16:01:30]

s/beforeunload/BeforeUnload
s/renderer it/renderer is

[carlosk, 2015/06/10 11:53:09]

Done.

+  // live or this frame is not the root.

[clamy, 2015/06/09 16:01:30]

nit: I would rephrase the whole sentence as: This is the case if the current
renderer is live and this frame is the main frame. (to avoid the negations).

[carlosk, 2015/06/10 11:53:09]

Done.

+  bool ShouldDispatchBeforeUnload();
+
   // Set the frame's opener to null in the renderer process in response to an
   // action in another renderer process.
   void DisownOpener();