Cache gfx::RenderText instances in views::Label.

ui/gfx/harfbuzz_font_skia.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/harfbuzz_font_skia.h"
 
 #include <limits>
 #include <map>
 
 #include "base/lazy_instance.h"
@@ skipping 240 matching lines @@
  private:
   hb_face_t* face_;
 };
 
 }  // namespace
 
 // Creates a HarfBuzz font from the given Skia face and text size.
 hb_font_t* CreateHarfBuzzFont(SkTypeface* skia_face,
                               SkScalar text_size,
                               const FontRenderParams& params,
-                              bool background_is_transparent) {
+                              bool subpixel_rendering_enabled) {
   // TODO(ckocagil): This shouldn't grow indefinitely. Maybe use base::MRUCache?
   static std::map<SkFontID, FaceCache> face_caches;
 
   FaceCache* face_cache = &face_caches[skia_face->uniqueID()];
   if (face_cache->first.get() == NULL)
     face_cache->first.Init(skia_face);
 
   hb_font_t* harfbuzz_font = hb_font_create(face_cache->first.get());
   const int scale = SkScalarToFixed(text_size);
   hb_font_set_scale(harfbuzz_font, scale, scale);
   FontData* hb_font_data = new FontData(&face_cache->second);
   hb_font_data->paint_.setTypeface(skia_face);
   hb_font_data->paint_.setTextSize(text_size);
   // TODO(ckocagil): Do we need to update these params later?
-  internal::ApplyRenderParams(params, background_is_transparent,
+  internal::ApplyRenderParams(params, subpixel_rendering_enabled,
                               &hb_font_data->paint_);
   hb_font_set_funcs(harfbuzz_font, g_font_funcs.Get().get(), hb_font_data,
                     DeleteByType<FontData>);
   hb_font_make_immutable(harfbuzz_font);
   return harfbuzz_font;
 }
 
 }  // namespace gfx