Use a direct include of strings headers in content/renderer and content/shell.

BUG=247723
TEST=none
[email protected]

Review URL: https://chromiumcodereview.appspot.com/16756003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205451 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/shell/shell.cc b/content/shell/shell.cc
index a921a30..8dec182f 100644
--- a/content/shell/shell.cc
+++ b/content/shell/shell.cc
@@ -8,9 +8,9 @@
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/path_service.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 "base/strings/utf_string_conversions.h"
 #include "content/public/browser/devtools_manager.h"
 #include "content/public/browser/navigation_controller.h"