Optimize setting the font when drawing in RenderTextLinux.

ui/gfx/render_text_linux.cc

 // Copyright (c) 2011 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_linux.h"
 
 #include <pango/pangocairo.h>
 #include <algorithm>
 #include <vector>
 
 #include "base/debug/trace_event.h"
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
+#include "third_party/skia/include/core/SkTypeface.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/pango_util.h"
 #include "unicode/uchar.h"
 #include "unicode/ustring.h"
 
 namespace {
 
 // Returns whether the given Pango item is Left to Right.
 bool IsRunLTR(const PangoItem* item) {
@@ skipping 288 matching lines @@
         style = i;
         break;
       }
     }
     DCHECK_GE(style, 0);
 
     PangoFontDescription* native_font =
         pango_font_describe(run->item->analysis.font);
     {
       TRACE_EVENT0("gfx", "RenderTextLinux::DrawVisualText SetFont");
-      renderer.SetFont(gfx::Font(native_font));
+      const char* family_name = pango_font_description_get_family(native_font);
+      SkAutoTUnref<SkTypeface> typeface(
+          SkTypeface::CreateFromName(family_name, SkTypeface::kNormal));
+      renderer.SetTypeface(typeface.get());
+      renderer.SetTextSize(GetPangoFontSizeInPixels(native_font));
     }
     pango_font_description_free(native_font);
 
     SkScalar glyph_x = x;
     SkScalar start_x = x;
     int start = 0;
 
     glyphs.resize(glyph_count);
     pos.resize(glyph_count);
 
@@ skipping 427 matching lines @@
 }
 
 void RenderTextLinux::GetSelectionBounds(std::vector<Rect>* bounds) {
   if (selection_visual_bounds_.empty())
     CalculateSubstringBounds(GetSelectionStart(), GetCursorPosition(),
                              &selection_visual_bounds_);
   *bounds = selection_visual_bounds_;
 }
 
 }  // namespace gfx