Move EmptyString, kWhitespace and the BOM to base.

chrome/browser/drive/drive_api_util.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/drive/drive_api_util.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/scoped_platform_file_closer.h"
@@ skipping 144 matching lines @@
     }
     result.push_back(str[i]);
   }
   return result;
 }
 
 std::string TranslateQuery(const std::string& original_query) {
   // In order to handle non-ascii white spaces correctly, convert to UTF16.
   base::string16 query = UTF8ToUTF16(original_query);
   const base::string16 kDelimiter(
-      kWhitespaceUTF16 + base::string16(1, static_cast<char16>('"')));
+      base::kWhitespaceUTF16 + base::string16(1, static_cast<char16>('"')));
 
   std::string result;
-  for (size_t index = query.find_first_not_of(kWhitespaceUTF16);
+  for (size_t index = query.find_first_not_of(base::kWhitespaceUTF16);
        index != base::string16::npos;
-       index = query.find_first_not_of(kWhitespaceUTF16, index)) {
+       index = query.find_first_not_of(base::kWhitespaceUTF16, index)) {
     bool is_exclusion = (query[index] == '-');
     if (is_exclusion)
       ++index;
     if (index == query.length()) {
       // Here, the token is '-' and it should be ignored.
       continue;
     }
 
     size_t begin_token = index;
     base::string16 token;
@@ skipping 409 matching lines @@
 
   base::MD5Digest digest;
   base::MD5Final(&digest, &context);
   return MD5DigestToBase16(digest);
 }
 
 const char kWapiRootDirectoryResourceId[] = "folder:root";
 
 }  // namespace util
 }  // namespace drive