Use a direct include of strings headers in chrome/browser/r*-s*/.

BUG=247723
TEST=none
[email protected]

Review URL: https://chromiumcodereview.appspot.com/15906011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205318 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/spellchecker/spelling_service_client.h b/chrome/browser/spellchecker/spelling_service_client.h
index 08ae2e95..6edeae97 100644
--- a/chrome/browser/spellchecker/spelling_service_client.h
+++ b/chrome/browser/spellchecker/spelling_service_client.h
@@ -12,7 +12,7 @@
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 class GURL;