Make WebURLLoader capable of retaining received buffers.

content/child/threaded_data_provider.cc

Index: content/child/threaded_data_provider.cc
diff --git a/content/child/threaded_data_provider.cc b/content/child/threaded_data_provider.cc
index eea420a44a17aef56c0b73268fc665ef2cf41617..994f2e1d19bfda774ced4d082d219e1eb354cb56 100644
--- a/content/child/threaded_data_provider.cc
+++ b/content/child/threaded_data_provider.cc
@@ -7,6 +7,7 @@
 #include "components/scheduler/child/webthread_impl_for_worker_scheduler.h"
 #include "content/child/child_process.h"
 #include "content/child/child_thread_impl.h"
+#include "content/child/ref_counted_shared_memory.h"
 #include "content/child/resource_dispatcher.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/common/resource_messages.h"
@@ -120,7 +121,7 @@ void DataProviderMessageFilter::OnReceivedData(int request_id,
 ThreadedDataProvider::ThreadedDataProvider(
     int request_id,
     blink::WebThreadedDataReceiver* threaded_data_receiver,
-    linked_ptr<base::SharedMemory> shm_buffer,
+    scoped_refptr<RefCountedSharedMemory> shm_buffer,
     int shm_size,
     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner)
     : request_id_(request_id),
@@ -275,7 +276,7 @@ void ThreadedDataProvider::OnReceivedDataOnBackgroundThread(
   DCHECK(shm_buffer_ != NULL);
 
   CHECK_GE(shm_size_, data_offset + data_length);
-  const char* data_ptr = static_cast<char*>(shm_buffer_->memory());
+  const char* data_ptr = static_cast<char*>(shm_buffer_->memory().memory());
   CHECK(data_ptr);
   CHECK(data_ptr + data_offset);