Reland "Throttle resource message requests during user interaction"

content/child/resource_dispatcher.h

 // Copyright (c) 2012 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 #define CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 
 #include <deque>
@@ skipping 73 matching lines @@
   // Indicates the priority of the specified request changed.
   void DidChangePriority(int request_id,
                          net::RequestPriority new_priority,
                          int intra_priority_value);
 
   // The provided data receiver will receive incoming resource data rather
   // than the resource bridge.
   bool AttachThreadedDataReceiver(
       int request_id, blink::WebThreadedDataReceiver* threaded_data_receiver);
 
+  void set_message_sender(IPC::Sender* sender) {
+    DCHECK(sender);
+    DCHECK(pending_requests_.empty());
+    message_sender_ = sender;
+  }
+
   IPC::Sender* message_sender() const { return message_sender_; }
 
   // This does not take ownership of the delegate. It is expected that the
   // delegate have a longer lifetime than the ResourceDispatcher.
   void set_delegate(ResourceDispatcherDelegate* delegate) {
     delegate_ = delegate;
   }
 
   // Remembers IO thread timestamp for next resource message.
   void set_io_timestamp(base::TimeTicks io_timestamp) {
@@ skipping 122 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   base::WeakPtrFactory<ResourceDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_RESOURCE_DISPATCHER_H_