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

trunk/src/chrome/browser/extensions/api/serial/serial_connection.cc

 // Copyright 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/extensions/api/serial/serial_connection.h"
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 150 matching lines @@
 }
 
 void SerialConnection::StartOpen() {
   DCHECK(!open_complete_.is_null());
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   DCHECK_EQ(file_, base::kInvalidPlatformFileValue);
   base::PlatformFile file = base::kInvalidPlatformFileValue;
   // It's the responsibility of the API wrapper around SerialConnection to
   // validate the supplied path against the set of valid port names, and
   // it is a reasonable assumption that serial port names are ASCII.
-  DCHECK(base::IsStringASCII(port_));
+  DCHECK(IsStringASCII(port_));
   base::FilePath path(
       base::FilePath::FromUTF8Unsafe(MaybeFixUpPortName(port_)));
   int flags = base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ |
               base::PLATFORM_FILE_EXCLUSIVE_READ | base::PLATFORM_FILE_WRITE |
               base::PLATFORM_FILE_EXCLUSIVE_WRITE | base::PLATFORM_FILE_ASYNC |
               base::PLATFORM_FILE_TERMINAL_DEVICE;
   file = base::CreatePlatformFile(path, flags, NULL, NULL);
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
@@ skipping 71 matching lines @@
       FROM_HERE,
       base::Bind(&TimeoutTask::Run, weak_factory_.GetWeakPtr()),
       delay_);
 }
 
 SerialConnection::TimeoutTask::~TimeoutTask() {}
 
 void SerialConnection::TimeoutTask::Run() const { closure_.Run(); }
 
 }  // namespace extensions