chrome: Use stl utilities from the base namespace

chrome/browser/media_galleries/linux/mtp_device_delegate_impl_linux.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 "chrome/browser/media_galleries/linux/mtp_device_delegate_impl_linux.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 
@@ skipping 408 matching lines @@
     uint32_t file_id,
     const std::string& file_name,
     MTPFileNode* parent,
     FileIdToMTPFileNodeMap* file_id_to_node_map)
     : file_id_(file_id),
       file_name_(file_name),
       parent_(parent),
       file_id_to_node_map_(file_id_to_node_map) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   DCHECK(file_id_to_node_map_);
-  DCHECK(!ContainsKey(*file_id_to_node_map_, file_id_));
+  DCHECK(!base::ContainsKey(*file_id_to_node_map_, file_id_));
   (*file_id_to_node_map_)[file_id_] = this;
 }
 
 MTPDeviceDelegateImplLinux::MTPFileNode::~MTPFileNode() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   size_t erased = file_id_to_node_map_->erase(file_id_);
   DCHECK_EQ(1U, erased);
 }
 
 const MTPDeviceDelegateImplLinux::MTPFileNode*
@@ skipping 14 matching lines @@
   children_.set(name, base::WrapUnique(new MTPFileNode(id, name, this,
                                                        file_id_to_node_map_)));
 }
 
 void MTPDeviceDelegateImplLinux::MTPFileNode::ClearNonexistentChildren(
     const std::set<std::string>& children_to_keep) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   std::set<std::string> children_to_erase;
   for (ChildNodes::const_iterator it = children_.begin();
        it != children_.end(); ++it) {
-    if (ContainsKey(children_to_keep, it->first))
+    if (base::ContainsKey(children_to_keep, it->first))
       continue;
     children_to_erase.insert(it->first);
   }
   for (std::set<std::string>::iterator it = children_to_erase.begin();
        it != children_to_erase.end(); ++it) {
     children_.take_and_erase(*it);
   }
 }
 
 bool MTPDeviceDelegateImplLinux::MTPFileNode::DeleteChild(uint32_t file_id) {
@@ skipping 1415 matching lines @@
   }
 }
 
 void CreateMTPDeviceAsyncDelegate(
     const std::string& device_location,
     const bool read_only,
     const CreateMTPDeviceAsyncDelegateCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   callback.Run(new MTPDeviceDelegateImplLinux(device_location, read_only));
 }