PlzNavigate: Create the speculative renderer earlier.

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index 9b28575a1ab9c3930ec268cdd26f6c9d39319237..babd445f24f9724178a7a9ca271a8b4eac9ad9fd 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -384,9 +384,10 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   int GetRoutingIdForSiteInstance(SiteInstance* site_instance);
 
   // PlzNavigate
-  // Notifies the RFHM that a navigation has begun so that it can speculatively
-  // create a new RenderFrameHost (and potentially a new process) if needed.
-  void BeginNavigation(const NavigationRequest& request);
+  // Notifies the RenderFrameHostManager that a new NavigationRequest has been
+  // set in the frame node so that it can speculatively create a new

[nasko, 2015/06/12 17:22:22]

nit: Let's use actual class names, so it is more concrete. s/frame
node/FrameTreeNode/.

[carlosk, 2015/06/15 19:11:54]

Done.

+  // RenderFrameHost (and potentially a new process) if needed.
+  void DidSetNavigationRequest(const NavigationRequest& request);
 
   // PlzNavigate
   // Called (possibly several times) during a navigation to select or create an