Remove stray platform_file.h from chrome and components

chrome/renderer/spellchecker/spellcheck_unittest.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 "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
-#include "base/platform_file.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/common/spellcheck_result.h"
 #include "chrome/renderer/spellchecker/hunspell_engine.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebTextCheckingCompletion.h"
 #include "third_party/WebKit/public/web/WebTextCheckingResult.h"
@@ skipping 1348 matching lines @@
         strlen(kTestCases[i].misspelled),
         0,
         &misspelling_start,
         &misspelling_length,
         &suggestions));
     EXPECT_GE(suggestions.size(), static_cast<size_t>(1));
     if (suggestions.size() > 0)
       EXPECT_EQ(suggestions[0], base::ASCIIToUTF16(kTestCases[i].suggestion));
   }
 }