Clean up ResourceHandler API.

content/browser/loader/layered_resource_handler.cc

Index: content/browser/loader/layered_resource_handler.cc
diff --git a/content/browser/loader/layered_resource_handler.cc b/content/browser/loader/layered_resource_handler.cc
index 872bc7a422d773469ecceea984b6f9e4b51116a3..0ad0cebcc82fc9ea81ae8e3358d4573968b61fed 100644
--- a/content/browser/loader/layered_resource_handler.cc
+++ b/content/browser/loader/layered_resource_handler.cc
@@ -9,8 +9,10 @@
 namespace content {
 
 LayeredResourceHandler::LayeredResourceHandler(
+    net::URLRequest* request,
     scoped_ptr<ResourceHandler> next_handler)
-    : next_handler_(next_handler.Pass()) {
+    : ResourceHandler(request),
+      next_handler_(next_handler.Pass()) {
 }
 
 LayeredResourceHandler::~LayeredResourceHandler() {
@@ -54,8 +56,10 @@ bool LayeredResourceHandler::OnWillStart(int request_id, const GURL& url,
   return next_handler_->OnWillStart(request_id, url, defer);
 }
 
-bool LayeredResourceHandler::OnWillRead(int request_id, net::IOBuffer** buf,
-                                        int* buf_size, int min_size) {
+bool LayeredResourceHandler::OnWillRead(int request_id,
+                                        scoped_refptr<net::IOBuffer>* buf,
+                                        int* buf_size,
+                                        int min_size) {
   DCHECK(next_handler_.get());
   return next_handler_->OnWillRead(request_id, buf, buf_size, min_size);
 }