Header cleanup in base.

This makes uses of StringPrintf and friends use the base namespace and include
stringprintf.h explicitly. This also removes a bunch of unnecessary string_util
includes (which exposed a few other errors like people forgetting to include
<vector>.

TEST=it compiles
BUG=none

Review URL: http://codereview.chromium.org/3119022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56446 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/command_line_unittest.cc b/base/command_line_unittest.cc
index 8c8803c..a34cf43 100644
--- a/base/command_line_unittest.cc
+++ b/base/command_line_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -8,7 +8,7 @@
 #include "base/command_line.h"
 #include "base/basictypes.h"
 #include "base/file_path.h"
-#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // To test Windows quoting behavior, we use a string that has some backslashes
@@ -123,7 +123,7 @@
   std::string switch4 = "switch4";
   std::string value4 = "\"a value with quotes\"";
   std::string switch5 = "quotes";
-  std::string value5 = WideToASCII(TRICKY);
+  std::string value5 = WideToUTF8(TRICKY);
 
   CommandLine cl(FilePath(FILE_PATH_LITERAL("Program")));