Enable RenderTextHarfBuzz by default

ui/gfx/render_text_unittest.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.h"
 
 #include <algorithm>
 
 #include "base/format_macros.h"
 #include "base/i18n/break_iterator.h"
@@ skipping 168 matching lines @@
   expected_italic.resize(3);
   EXPECT_TRUE(render_text->styles()[ITALIC].EqualsForTesting(expected_italic));
 
   // Appending text should extend the terminal styles without changing breaks.
   render_text->SetText(ASCIIToUTF16("012345678"));
   EXPECT_TRUE(render_text->styles()[ITALIC].EqualsForTesting(expected_italic));
 }
 
 #if defined(OS_LINUX) && !defined(USE_OZONE)
 TEST_F(RenderTextTest, PangoAttributes) {
-  scoped_ptr<RenderText> render_text(RenderText::CreateInstance());
+  scoped_ptr<RenderText> render_text(RenderText::CreateNativeInstance());
   render_text->SetText(ASCIIToUTF16("012345678"));
 
   // Apply ranged BOLD/ITALIC styles and check the resulting Pango attributes.
   render_text->ApplyStyle(BOLD, true, Range(2, 4));
   render_text->ApplyStyle(ITALIC, true, Range(1, 3));
 
   struct {
     int start;
     int end;
     bool bold;
@@ skipping 2085 matching lines @@
   EXPECT_EQ(Range(0, 0), run.CharRangeToGlyphRange(Range(4, 5)));
   EXPECT_EQ(Range(0, 0), run.GetGraphemeBounds(iter.get(), 4));
   Range chars;
   Range glyphs;
   run.GetClusterAt(4, &chars, &glyphs);
   EXPECT_EQ(Range(3, 8), chars);
   EXPECT_EQ(Range(0, 0), glyphs);
 }
 
 }  // namespace gfx