base::Bind: Convert Socket::Write.

net/socket/client_socket_pool_base_unittest.cc

Index: net/socket/client_socket_pool_base_unittest.cc
diff --git a/net/socket/client_socket_pool_base_unittest.cc b/net/socket/client_socket_pool_base_unittest.cc
index fdbc63f139f0aaf39f14cc9b92317d65d2d2d053..601a293f3cc972c3afa6e0c61b578155d3b8fbda 100644
--- a/net/socket/client_socket_pool_base_unittest.cc
+++ b/net/socket/client_socket_pool_base_unittest.cc
@@ -66,6 +66,11 @@ class MockClientSocket : public StreamSocket {
     was_used_to_convey_data_ = true;
     return len;
   }
+  virtual int Write(
+      IOBuffer* /* buf */, int len, const CompletionCallback& /* callback */) {
+    was_used_to_convey_data_ = true;
+    return len;
+  }
   virtual bool SetReceiveBufferSize(int32 size) { return true; }
   virtual bool SetSendBufferSize(int32 size) { return true; }