Use a direct include of strings headers in net/http/.

BUG=247723
TEST=none
TBR=ben@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15906017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205594 0039d316-1c4b-4281-b951-d872f2087c98

diff --git a/net/http/partial_data.cc b/net/http/partial_data.cc
index 0e095ad..02fda6c 100644
--- a/net/http/partial_data.cc
+++ b/net/http/partial_data.cc

@@ -8,9 +8,9 @@
 #include "base/bind_helpers.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
-#include "base/string_number_conversions.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/http/http_response_headers.h"