sandbox/win: Fix warnings found by clang chromium-style plugin on Windows.

sandbox/win/src/crosscall_server.cc

Index: sandbox/win/src/crosscall_server.cc
diff --git a/sandbox/win/src/crosscall_server.cc b/sandbox/win/src/crosscall_server.cc
index a01af66442391e60b5a85a5095184c16ce4c545c..6f8bd744f20ead53a84881fb1b6bb7525717ab82 100644
--- a/sandbox/win/src/crosscall_server.cc
+++ b/sandbox/win/src/crosscall_server.cc
@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "sandbox/win/src/crosscall_server.h"
+
 #include <string>
 #include <vector>
 
-#include "sandbox/win/src/crosscall_server.h"
 #include "sandbox/win/src/crosscall_params.h"
 #include "sandbox/win/src/crosscall_client.h"
 #include "base/logging.h"
@@ -297,4 +298,10 @@ Dispatcher* Dispatcher::OnMessageReady(IPCParams* ipc,
   return NULL;
 }
 
+Dispatcher::Dispatcher() {
+}
+
+Dispatcher::~Dispatcher() {
+}
+
 }  // namespace sandbox