Remove redundant c_str() calls.

chrome/browser/devtools/device/port_forwarding_controller.cc

 // Copyright 2014 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/browser/devtools/device/port_forwarding_controller.h"
 
 #include <map>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 403 matching lines @@
 
   std::string location = it->second;
   std::vector<std::string> tokens = base::SplitString(
       location, ":", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
   int destination_port = 0;
   if (tokens.size() != 2 || !base::StringToInt(tokens[1], &destination_port))
     return;
   std::string destination_host = tokens[0];
 
   device_->OpenSocket(
-      connection_id.c_str(),
+      connection_id,
       base::Bind(&SocketTunnel::StartTunnel,
                  destination_host,
                  destination_port));
 }
 
 PortForwardingController::PortForwardingController(Profile* profile)
     : pref_service_(profile->GetPrefs()) {
   pref_change_registrar_.Init(pref_service_);
   base::Closure callback = base::Bind(
       &PortForwardingController::OnPrefsChange, base::Unretained(this));
@@ skipping 56 matching lines @@
   if (!forwarding_map_.empty())
     UpdateConnections();
   else
     CloseAllConnections();
 }
 
 void PortForwardingController::UpdateConnections() {
   for (Registry::iterator it = registry_.begin(); it != registry_.end(); ++it)
     it->second->UpdateForwardingMap(forwarding_map_);
 }