Make WebURLLoader capable of retaining received buffers.

content/child/resource_dispatcher.h

Index: content/child/resource_dispatcher.h
diff --git a/content/child/resource_dispatcher.h b/content/child/resource_dispatcher.h
index 769eae2589f2040106bb8dbd6fa17432ff220f3b..83734331f8f3dc3ab46c534d1eeda04da76a8630 100644
--- a/content/child/resource_dispatcher.h
+++ b/content/child/resource_dispatcher.h
@@ -12,6 +12,7 @@
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
@@ -36,6 +37,7 @@ struct RedirectInfo;
 }
 
 namespace content {
+class RefCountedSharedMemory;
 class RequestPeer;
 class ResourceDispatcherDelegate;
 class ResourceRequestBody;
@@ -164,7 +166,7 @@ class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
     base::TimeTicks request_start;
     base::TimeTicks response_start;
     base::TimeTicks completion_time;
-    linked_ptr<base::SharedMemory> buffer;
+    scoped_refptr<RefCountedSharedMemory> buffer;
     linked_ptr<SiteIsolationResponseMetaData> site_isolation_metadata;
     bool blocked_response;
     int buffer_size;