Move fail on suspend logic from URLRequestJob to TcpClientSocket.

net/socket/stream_socket.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.
 
 #ifndef NET_SOCKET_STREAM_SOCKET_H_
 #define NET_SOCKET_STREAM_SOCKET_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 116 matching lines @@
   // counts the payload bytes. Transport headers are not counted. Returns
   // 0 if the socket does not implement the function. The count is reset when
   // Disconnect() is called.
   virtual int64_t GetTotalReceivedBytes() const = 0;
 
   // Dumps memory allocation stats into |stats|. |stats| can be assumed as being
   // default initialized upon entry. Implementations should override fields in
   // |stats|. Default implementation does nothing.
   virtual void DumpMemoryStats(SocketMemoryStats* stats) const {}
 
+  // Sets whether the socket should treat entering suspend mode as an error, and
+  // return ERR_NETWORK_SUSPENDED if it happens. Defaults to false.
+  //
+  // This is useful because entering suspend mode tends to kill all sockets
+  // connected to remote systems.  See https://crbug.com/4606).
+  //
+  // This is a hint only, subclasses are free to ignore this flag (And currently
+  // do - it's only respected when set directly on a TcpClientSocket).
+  //
+  // TODO(mmenke):  Should this be done on all TCP sockets? On all non-localhost
+  // TCP sockets?
+  virtual void SetFailOnSuspend(bool disconnect_on_suspend);
+
  protected:
   // The following class is only used to gather statistics about the history of
   // a socket.  It is only instantiated and used in basic sockets, such as
   // TCPClientSocket* instances.  Other classes that are derived from
   // StreamSocket should forward any potential settings to their underlying
   // transport sockets.
   class UseHistory {
    public:
     UseHistory();
     ~UseHistory();
@@ skipping 26 matching lines @@
     // identify the motivation.
     bool omnibox_speculation_;
     bool subresource_speculation_;
     DISALLOW_COPY_AND_ASSIGN(UseHistory);
   };
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_STREAM_SOCKET_H_