[chromeos] Remove dependencies of StatisticsProvider on chrome.

chrome/browser/chromeos/drive/file_cache.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/chromeos/drive/file_cache.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/sys_info.h"
 #include "base/task_runner_util.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_cache_metadata.h"
 #include "chrome/browser/chromeos/drive/file_cache_observer.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/google_apis/task_util.h"
+#include "chromeos/chromeos_constants.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace drive {
 namespace {
 
 const base::FilePath::CharType kFileCacheMetaDir[] = FILE_PATH_LITERAL("meta");
 const base::FilePath::CharType kFileCacheOutgoingDir[] =
     FILE_PATH_LITERAL("outgoing");
@@ skipping 1192 matching lines @@
   return success;
 }
 
 // static
 FileCache::CacheSubDirectoryType FileCache::GetSubDirectoryType(
     const FileCacheEntry& cache_entry) {
   return cache_entry.is_persistent() ? CACHE_TYPE_PERSISTENT : CACHE_TYPE_TMP;
 }
 
 }  // namespace drive