storage: Use stl utilities from the base namespace

storage/browser/fileapi/sandbox_file_system_backend_delegate.cc

 // Copyright 2013 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 "storage/browser/fileapi/sandbox_file_system_backend_delegate.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 375 matching lines @@
 }
 
 int64_t SandboxFileSystemBackendDelegate::GetOriginUsageOnFileTaskRunner(
     FileSystemContext* file_system_context,
     const GURL& origin_url,
     FileSystemType type) {
   DCHECK(file_task_runner_->RunsTasksOnCurrentThread());
 
   // Don't use usage cache and return recalculated usage for sticky invalidated
   // origins.
-  if (ContainsKey(sticky_dirty_origins_, std::make_pair(origin_url, type)))
+  if (base::ContainsKey(sticky_dirty_origins_,
+                        std::make_pair(origin_url, type)))
     return RecalculateUsage(file_system_context, origin_url, type);
 
   base::FilePath base_path =
       GetBaseDirectoryForOriginAndType(origin_url, type, false);
   if (base_path.empty() || !base::DirectoryExists(base_path))
     return 0;
   base::FilePath usage_file_path =
       base_path.Append(FileSystemUsageCache::kUsageFileName);
 
   bool is_valid = usage_cache()->IsValid(usage_file_path);
@@ skipping 288 matching lines @@
   return new ObfuscatedFileUtil(special_storage_policy,
                                 file_system_directory,
                                 env_override,
                                 file_task_runner,
                                 base::Bind(&GetTypeStringForURL),
                                 GetKnownTypeStrings(),
                                 NULL);
 }
 
 }  // namespace storage