Remove stray platform_file.h from chrome and components

chrome/browser/devtools/devtools_file_system_indexer.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 "chrome/browser/devtools/devtools_file_system_indexer.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util_proxy.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/platform_file.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
 
 using base::Bind;
 using base::Callback;
 using base::FileEnumerator;
 using base::FilePath;
 using base::Time;
 using base::TimeDelta;
 using base::TimeTicks;
-using base::PassPlatformFile;
-using base::PlatformFile;
 using content::BrowserThread;
 using std::map;
 using std::set;
 using std::string;
 using std::vector;
 
 namespace {
 
 typedef int32 Trigram;
 typedef char TrigramChar;
@@ skipping 451 matching lines @@
   vector<FilePath> file_paths = g_trigram_index.Get().Search(query);
   vector<string> result;
   FilePath path = FilePath::FromUTF8Unsafe(file_system_path);
   vector<FilePath>::const_iterator it = file_paths.begin();
   for (; it != file_paths.end(); ++it) {
     if (path.IsParent(*it))
       result.push_back(it->AsUTF8Unsafe());
   }
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, Bind(callback, result));
 }