Revert 257524 "Move IsStringASCII/UTF8 to base namespace."

trunk/src/chrome/browser/chromeos/drive/file_system_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/chromeos/drive/file_system_util.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 281 matching lines @@
       c = (HexDigitToInt(filename[i + 1]) << 4) +
            HexDigitToInt(filename[i + 2]);
       i += 2;
     }
     unescaped.push_back(c);
   }
   return unescaped;
 }
 
 std::string NormalizeFileName(const std::string& input) {
-  DCHECK(base::IsStringUTF8(input));
+  DCHECK(IsStringUTF8(input));
 
   std::string output;
   if (!base::ConvertToUtf8AndNormalize(input, base::kCodepageUTF8, &output))
     output = input;
   base::ReplaceChars(output, kSlash, std::string(kEscapedChars), &output);
   if (!output.empty() && output.find_first_not_of(kDot, 0) == std::string::npos)
     output = kEscapedChars;
   return output;
 }
 
@@ skipping 107 matching lines @@
   const bool disable_sync_over_celluar =
       profile->GetPrefs()->GetBoolean(prefs::kDisableDriveOverCellular);
 
   if (is_connection_cellular && disable_sync_over_celluar)
     return DRIVE_CONNECTED_METERED;
   return DRIVE_CONNECTED;
 }
 
 }  // namespace util
 }  // namespace drive