Implement ResourceQueue, an object that makes it easy to delay starting

chrome/browser/renderer_host/cross_site_resource_handler.h

Index: chrome/browser/renderer_host/cross_site_resource_handler.h
diff --git a/chrome/browser/renderer_host/cross_site_resource_handler.h b/chrome/browser/renderer_host/cross_site_resource_handler.h
index 7e916c118aee656438e8bba3ef6393d68fabd038..fc6bef22df9cd9acb10d1d58d58093f8a3a777e8 100644
--- a/chrome/browser/renderer_host/cross_site_resource_handler.h
+++ b/chrome/browser/renderer_host/cross_site_resource_handler.h
@@ -5,9 +5,11 @@
 #ifndef CHROME_BROWSER_RENDERER_HOST_CROSS_SITE_RESOURCE_HANDLER_H_
 #define CHROME_BROWSER_RENDERER_HOST_CROSS_SITE_RESOURCE_HANDLER_H_
 
-#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 #include "chrome/browser/renderer_host/resource_handler.h"
 
+class ResourceDispatcherHost;
+struct GlobalRequestID;
+
 // Ensures that cross-site responses are delayed until the onunload handler of
 // the previous page is allowed to run.  This handler wraps an
 // AsyncEventHandler, and it sits inside SafeBrowsing and Buffered event
@@ -44,7 +46,7 @@ class CrossSiteResourceHandler : public ResourceHandler {
   void StartCrossSiteTransition(
       int request_id,
       ResourceResponse* response,
-      ResourceDispatcherHost::GlobalRequestID global_id);
+      const GlobalRequestID& global_id);
 
   scoped_refptr<ResourceHandler> next_handler_;
   int render_process_host_id_;