Add the "virtual" keyword on method overrides that are missing it.

chrome/plugin/webplugin_proxy.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/plugin/webplugin_proxy.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include "app/win_util.h"
@@ skipping 97 matching lines @@
 }
 
 bool WebPluginProxy::Send(IPC::Message* msg) {
   return channel_->Send(msg);
 }
 
 void WebPluginProxy::SetWindow(gfx::PluginWindowHandle window) {
   Send(new PluginHostMsg_SetWindow(route_id_, window));
 }
 
+void WebPluginProxy::SetAcceptsInputEvents(bool accepts) {
+  NOTREACHED();
+}
+
 void WebPluginProxy::WillDestroyWindow(gfx::PluginWindowHandle window) {
 #if defined(OS_WIN)
   PluginThread::current()->Send(
       new PluginProcessHostMsg_PluginWindowDestroyed(
           window, ::GetParent(window)));
 #elif defined(USE_X11)
   // Nothing to do.
 #else
   NOTIMPLEMENTED();
 #endif
@@ skipping 597 matching lines @@
     } else {
       index++;
     }
   }
 }
 
 void WebPluginProxy::URLRedirectResponse(bool allow, int resource_id) {
   Send(new PluginHostMsg_URLRedirectResponse(route_id_, allow, resource_id));
 }