Coverity: Initialize member variables.

chrome/browser/extensions/api/serial/serial_api.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 <string>
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/serial/serial_api.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 32 matching lines @@
       BrowserThread::UI, FROM_HERE,
       base::Bind(&SerialOpenFunction::RespondOnUIThread, this));
   DCHECK(rv);
 }
 
 void SerialOpenFunction::RespondOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   SendResponse(true);
 }
 
-SerialCloseFunction::SerialCloseFunction() {
+SerialCloseFunction::SerialCloseFunction() : connection_id_(0) {
 }
 
 SerialCloseFunction::~SerialCloseFunction() {
 }
 
 bool SerialCloseFunction::RunImpl() {
   EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &connection_id_));
 
   bool rv = BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
@@ skipping 13 matching lines @@
       base::Bind(&SerialCloseFunction::RespondOnUIThread, this));
   DCHECK(rv);
 }
 
 void SerialCloseFunction::RespondOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   SendResponse(true);
 }
 
 }  // namespace extensions