some cleanup for base/stl_util

removed unused/irrelevant functions
removed irrelevant comments
Moved stl_util-inl.h => stl_util.h

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/7342047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93110 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/download/download_manager.cc b/chrome/browser/download/download_manager.cc
index 3e0cf36..a9fd0172 100644
--- a/chrome/browser/download/download_manager.cc
+++ b/chrome/browser/download/download_manager.cc
@@ -10,7 +10,7 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/rand_util.h"
-#include "base/stl_util-inl.h"
+#include "base/stl_util.h"
 #include "base/stringprintf.h"
 #include "base/sys_string_conversions.h"
 #include "base/task.h"