Pass WebKit priority changes and parsing messages up to the browser process.

content/public/browser/resource_throttle.h

Index: content/public/browser/resource_throttle.h
diff --git a/content/public/browser/resource_throttle.h b/content/public/browser/resource_throttle.h
index 4eb3bd7b81b181bbb908a7c2fc72132425089f7a..cca59e40014edbb43827425a820d993ffc3ca8ef 100644
--- a/content/public/browser/resource_throttle.h
+++ b/content/public/browser/resource_throttle.h
@@ -25,6 +25,7 @@ class ResourceThrottle {
   virtual void WillStartRequest(bool* defer) {}
   virtual void WillRedirectRequest(const GURL& new_url, bool* defer) {}
   virtual void WillProcessResponse(bool* defer) {}
+  virtual void OnRequestPriorityChanged() {}

[darin (slow to review), 2013/02/06 05:04:13]

Hmm, this doesn't quite fit with the scope of ResourceThrottle.  All of the
other methods are about providing opportunities to defer resource loading at
particular stages of the process.

 
   void set_controller_for_testing(ResourceController* c) {
     controller_ = c;