Make WebURLLoader capable of retaining received buffers.

content/child/threaded_data_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_THREADED_DATA_PROVIDER_H_
 #define CONTENT_CHILD_THREADED_DATA_PROVIDER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
@@ skipping 11 matching lines @@
 
 namespace IPC {
 class SyncChannel;
 }
 
 namespace scheduler {
 class WebThreadImplForWorkerScheduler;
 }
 
 namespace content {
+class RefCountedSharedMemory;
 class ResourceDispatcher;
 
 class ThreadedDataProvider {
  public:
   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_);
 
   // Any destruction of this class has to bounce via the background thread to
   // ensure all data is flushed; call Stop() to start this process.
   void Stop();
   void OnReceivedDataOnBackgroundThread(int data_offset,
                                         int data_length,
                                         int encoded_data_length);
 
@@ skipping 20 matching lines @@
   void ForwardAndACKData(const char* data,
                          int data_length,
                          int encoded_data_length);
   void DataNotifyForegroundThread(
       scoped_ptr<std::vector<char> > data_copy,
       int data_length,
       int encoded_data_length);
 
   scoped_refptr<IPC::MessageFilter> filter_;
   int request_id_;
-  linked_ptr<base::SharedMemory> shm_buffer_;
+  scoped_refptr<RefCountedSharedMemory> shm_buffer_;
   int shm_size_;
   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
       background_thread_weak_factory_;
   scheduler::WebThreadImplForWorkerScheduler& background_thread_;
   IPC::SyncChannel* ipc_channel_;
   blink::WebThreadedDataReceiver* threaded_data_receiver_;
   bool resource_filter_active_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   struct QueuedSharedMemoryData {
     const char* data;
     int length;
     int encoded_length;
   };
   std::vector<QueuedSharedMemoryData> queued_data_;
 
   base::WeakPtrFactory<ThreadedDataProvider>
       main_thread_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_THREADED_DATA_PROVIDER_H_