Support FontRenderParams on Win; fix RenderTextHarfBuzz.

ui/gfx/render_text_pango.cc

 // Copyright (c) 2012 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/render_text_pango.h"
 
 #include <pango/pangocairo.h>
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
-#include "ui/gfx/font_render_params_linux.h"
+#include "ui/gfx/font_render_params.h"
 #include "ui/gfx/pango_util.h"
 #include "ui/gfx/utf16_indexing.h"
 
 namespace gfx {
 
 namespace {
 
 // Returns the preceding element in a GSList (O(n)).
 GSList* GSListPrevious(GSList* head, GSList* item) {
   GSList* prev = NULL;
@@ skipping 347 matching lines @@
 
   std::vector<SkPoint> pos;
   std::vector<uint16> glyphs;
 
   internal::SkiaTextRenderer renderer(canvas);
   ApplyFadeEffects(&renderer);
   ApplyTextShadows(&renderer);
 
   // TODO(derat): Use font-specific params: http://crbug.com/125235
   const FontRenderParams& render_params = GetDefaultFontRenderParams();
-  const bool use_subpixel_rendering =
-      render_params.subpixel_rendering !=
-          FontRenderParams::SUBPIXEL_RENDERING_NONE;
-  renderer.SetFontSmoothingSettings(
-      render_params.antialiasing,
-      use_subpixel_rendering && !background_is_transparent(),
-      render_params.subpixel_positioning);
+  renderer.SetFontRenderParams(render_params, background_is_transparent());
 
   SkPaint::Hinting skia_hinting = SkPaint::kNormal_Hinting;
   switch (render_params.hinting) {
     case FontRenderParams::HINTING_NONE:
       skia_hinting = SkPaint::kNo_Hinting;
       break;
     case FontRenderParams::HINTING_SLIGHT:
       skia_hinting = SkPaint::kSlight_Hinting;
       break;
     case FontRenderParams::HINTING_MEDIUM:
@@ skipping 113 matching lines @@
                                           int glyph_index) const {
   return LayoutIndexToTextIndex(run->item->offset +
                                 run->glyphs->log_clusters[glyph_index]);
 }
 
 RenderText* RenderText::CreateNativeInstance() {
   return new RenderTextPango;
 }
 
 }  // namespace gfx