Move hb_language_t determination outside of for loop

Source/platform/fonts/shaping/HarfBuzzShaper.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 800 matching lines @@
 }
 
 bool HarfBuzzShaper::shapeHarfBuzzRuns()
 {
     HarfBuzzScopedPtr<hb_buffer_t> harfBuzzBuffer(hb_buffer_create(), hb_buffer_destroy);
 
     HarfBuzzRunCache& runCache = harfBuzzRunCache();
     const FontDescription& fontDescription = m_font->fontDescription();
     const String& localeString = fontDescription.locale();
     CString locale = localeString.latin1();
+    const hb_language_t language = hb_language_from_string(locale.data(), locale.length());
     HarfBuzzRun* previousRun = nullptr;
 
     for (unsigned i = 0; i < m_harfBuzzRuns.size(); ++i) {
         unsigned runIndex = m_run.rtl() ? m_harfBuzzRuns.size() - i - 1 : i;
         HarfBuzzRun* currentRun = m_harfBuzzRuns[runIndex].get();
 
         const SimpleFontData* currentFontData = currentRun->fontData();
         FontPlatformData* platformData = const_cast<FontPlatformData*>(&currentFontData->platformData());
         HarfBuzzFace* face = platformData->harfBuzzFace();
         if (!face)
             return false;
 
-        hb_buffer_set_language(harfBuzzBuffer.get(), hb_language_from_string(locale.data(), locale.length()));
+        hb_buffer_set_language(harfBuzzBuffer.get(), language);
         hb_buffer_set_script(harfBuzzBuffer.get(), currentRun->script());
         hb_buffer_set_direction(harfBuzzBuffer.get(), currentRun->direction());
 
         const UChar* src = m_normalizedBuffer.get() + currentRun->startIndex();
         std::wstring key(src, src + currentRun->numCharacters());
 
         CachedShapingResults* cachedResults = runCache.find(key);
         if (cachedResults) {
             if (isValidCachedResult(m_font, currentRun->direction(),
                 localeString, cachedResults)) {
@@ skipping 362 matching lines @@
     // possibly invalid from, to arguments.
     if (!foundToX && !foundFromX)
         fromX = toX = 0;
 
     if (fromX < toX)
         return FloatRect(point.x() + fromX, point.y(), toX - fromX, height);
     return FloatRect(point.x() + toX, point.y(), fromX - toX, height);
 }
 
 } // namespace blink