Modify ResourceMessageFilter so that it can support attaching to PluginProcessHost.

content/browser/loader/async_resource_handler.h

Index: content/browser/loader/async_resource_handler.h
===================================================================
--- content/browser/loader/async_resource_handler.h	(revision 222038)
+++ content/browser/loader/async_resource_handler.h	(working copy)
@@ -18,6 +18,7 @@
 
 namespace content {
 class ResourceBuffer;
+class ResourceContext;
 class ResourceDispatcherHostImpl;
 class ResourceMessageFilter;
 class SharedIOBuffer;
@@ -28,6 +29,7 @@
                              public ResourceMessageDelegate {
  public:
   AsyncResourceHandler(ResourceMessageFilter* filter,
+                       ResourceContext* resource_context,
                        net::URLRequest* request,
                        ResourceDispatcherHostImpl* rdh);
   virtual ~AsyncResourceHandler();
@@ -74,6 +76,7 @@
 
   scoped_refptr<ResourceBuffer> buffer_;
   scoped_refptr<ResourceMessageFilter> filter_;
+  ResourceContext* resource_context_;
   net::URLRequest* request_;
   ResourceDispatcherHostImpl* rdh_;