Use a direct include of strings headers in content/browser/, part 2.

BUG=247723
TEST=none
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Review URL: https://chromiumcodereview.appspot.com/16625010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205435 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/loader/buffered_resource_handler.cc b/content/browser/loader/buffered_resource_handler.cc
index d7c115d0..394a6882 100644
--- a/content/browser/loader/buffered_resource_handler.cc
+++ b/content/browser/loader/buffered_resource_handler.cc
@@ -9,7 +9,7 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/browser/download/download_stats.h"
 #include "content/browser/loader/certificate_resource_handler.h"