base: Move SplitStringDontTrim functions from string_util.h to string_split.h

base/mime_util_xdg.cc

Index: base/mime_util_xdg.cc
diff --git a/base/mime_util_xdg.cc b/base/mime_util_xdg.cc
index d00a568a3142816b22ff0a07d2a4d0b67c984762..5dc49600d5d7aff05b4e125b0bd4b1010de0c6ee 100644
--- a/base/mime_util_xdg.cc
+++ b/base/mime_util_xdg.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 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.
 
@@ -18,6 +18,7 @@
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "base/singleton.h"
+#include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/third_party/xdg_mime/xdgmime.h"
 
@@ -272,7 +273,7 @@ bool IconTheme::LoadIndexTheme(const FilePath& file) {
 
     std::string key, value;
     std::vector<std::string> r;
-    SplitStringDontTrim(entry, '=', &r);
+    base::SplitStringDontTrim(entry, '=', &r);
     if (r.size() < 2)
       continue;