make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

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 605af728c5c514b2b9c4cb5fd43fadd9632672c7..5a672b44a4e99a30fd2583b9a545c84287b9d5b4 100644
--- a/net/socket/client_socket_pool_base_unittest.cc
+++ b/net/socket/client_socket_pool_base_unittest.cc
@@ -145,8 +145,8 @@ class MockClientSocket : public StreamSocket {
     was_used_to_convey_data_ = true;
     return len;
   }
-  virtual bool SetReceiveBufferSize(int32 size) OVERRIDE { return true; }
-  virtual bool SetSendBufferSize(int32 size) OVERRIDE { return true; }
+  virtual int SetReceiveBufferSize(int32 size) OVERRIDE { return OK; }
+  virtual int SetSendBufferSize(int32 size) OVERRIDE { return OK; }
 
   // StreamSocket implementation.
   virtual int Connect(const CompletionCallback& callback) OVERRIDE {