Fix build with system icu

BUG=529776

Review URL: https://codereview.chromium.org/1330163005

git-svn-id: svn://svn.chromium.org/blink/trunk@201980 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/platform/fonts/ScriptRunIterator.cpp

@@ -8,8 +8,6 @@
 #include "platform/Logging.h"
 #include "wtf/Threading.h"
 
-#include <ubidi_props.h>
-
 namespace blink {
 
 typedef ScriptData::PairedBracketType PairedBracketType;