Coverity: Initialize a member variable.

content/browser/histogram_message_filter.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/browser/histogram_message_filter.h"
 
 #include "base/process_util.h"
 #include "content/browser/histogram_controller.h"
 #include "content/browser/tcmalloc_internals_request_job.h"
 #include "content/common/child_process_messages.h"
 
 namespace content {
 
-HistogramMessageFilter::HistogramMessageFilter() {
-}
+HistogramMessageFilter::HistogramMessageFilter() {}
 
 void HistogramMessageFilter::OnChannelConnected(int32 peer_pid) {
   BrowserMessageFilter::OnChannelConnected(peer_pid);
 }
 
 bool HistogramMessageFilter::OnMessageReceived(const IPC::Message& message,
                                               bool* message_was_ok) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(HistogramMessageFilter, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(ChildProcessHostMsg_ChildHistogramData,
                         OnChildHistogramData)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
   return handled;
 }
 
 HistogramMessageFilter::~HistogramMessageFilter() {}
 
 void HistogramMessageFilter::OnChildHistogramData(
     int sequence_number,
     const std::vector<std::string>& pickled_histograms) {
   HistogramController::GetInstance()->OnHistogramDataCollected(
       sequence_number, pickled_histograms);
 }
 }