Cleanup: Remove some unused code, or make them platform specific.

chrome/browser/browsing_data/browsing_data_file_system_helper.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/browsing_data/browsing_data_file_system_helper.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 170 matching lines @@
 
 BrowsingDataFileSystemHelper::FileSystemInfo::~FileSystemInfo() {}
 
 // static
 BrowsingDataFileSystemHelper* BrowsingDataFileSystemHelper::Create(
     fileapi::FileSystemContext* filesystem_context) {
   return new BrowsingDataFileSystemHelperImpl(filesystem_context);
 }
 
 CannedBrowsingDataFileSystemHelper::CannedBrowsingDataFileSystemHelper(
-    Profile* profile)
-    : is_fetching_(false) {
+    Profile* profile) {
 }
 
-CannedBrowsingDataFileSystemHelper::CannedBrowsingDataFileSystemHelper()
-    : is_fetching_(false) {
+CannedBrowsingDataFileSystemHelper::CannedBrowsingDataFileSystemHelper() {
 }
 
 CannedBrowsingDataFileSystemHelper::~CannedBrowsingDataFileSystemHelper() {}
 
 CannedBrowsingDataFileSystemHelper*
     CannedBrowsingDataFileSystemHelper::Clone() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   CannedBrowsingDataFileSystemHelper* clone =
       new CannedBrowsingDataFileSystemHelper();
   // This list only mutates on the UI thread, so it's safe to work with it here
@@ skipping 45 matching lines @@
 }
 
 void CannedBrowsingDataFileSystemHelper::StartFetching(
     const base::Callback<void(const std::list<FileSystemInfo>&)>& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE, base::Bind(callback, file_system_info_));
 }