PepperWebSocketHost should not call blink::WebSocket APIs after closed.

content/renderer/pepper/pepper_websocket_host.cc

 // 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.
 
 #include "content/renderer/pepper/pepper_websocket_host.h"
 
 #include <string>
 
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "net/base/net_util.h"
@@ skipping 176 matching lines @@
             unhandled_buffered_amount, was_clean, code, reason.utf8()));
   } else {
     accepting_close_ = false;
     host()->SendUnsolicitedReply(
         pp_resource(),
         PpapiPluginMsg_WebSocket_ClosedReply(
             unhandled_buffered_amount, was_clean, code, reason.utf8()));
   }
 
   // Disconnect.
-  if (websocket_)
+  if (websocket_) {
     websocket_->disconnect();
+    websocket_.reset();
+  }
 }
 
 int32_t PepperWebSocketHost::OnHostMsgConnect(
     ppapi::host::HostMessageContext* context,
     const std::string& url,
     const std::vector<std::string>& protocols) {
   // Validate url and convert it to WebURL.
   GURL gurl(url);
   url_ = gurl.spec();
   if (!gurl.is_valid())
@@ skipping 108 matching lines @@
 
 int32_t PepperWebSocketHost::OnHostMsgFail(
     ppapi::host::HostMessageContext* context,
     const std::string& message) {
   if (websocket_)
     websocket_->fail(WebString::fromUTF8(message));
   return PP_OK;
 }
 
 }  // namespace content