Fixed CHECKs for use of canceled ResourceContexts in ResourceDispatcherHostImpl.

content/browser/renderer_host/resource_dispatcher_host_impl.h

Index: content/browser/renderer_host/resource_dispatcher_host_impl.h
diff --git a/content/browser/renderer_host/resource_dispatcher_host_impl.h b/content/browser/renderer_host/resource_dispatcher_host_impl.h
index 7807a447c5b1e834ef14d59066277aed86d1aa7f..70e17651c87b1510acb961c0aecf9ee3e3cba651 100644
--- a/content/browser/renderer_host/resource_dispatcher_host_impl.h
+++ b/content/browser/renderer_host/resource_dispatcher_host_impl.h
@@ -88,6 +88,12 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   // new requests).  Cancels all pending requests.
   void Shutdown();
 
+  // Notify the ResourceDispatcherHostImpl of a new resource context.
+  void AddResourceContext(ResourceContext* context);
+
+  // Notify the ResourceDispatcherHostImpl of a resource context destruction.
+  void RemoveResourceContext(ResourceContext* context);
+
   // Force cancels any pending requests for the given |context|. This is
   // necessary to ensure that before |context| goes away, all requests
   // for it are dead.
@@ -514,7 +520,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
 
   // http://crbug.com/90971 - Assists in tracking down use-after-frees on
   // shutdown.
-  std::set<const ResourceContext*> canceled_resource_contexts_;
+  std::set<const ResourceContext*> active_resource_contexts_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };