Prepare to enable RenderTextHarfBuzz by default

ui/gfx/render_text.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 <climits>
 
 #include "base/command_line.h"
@@ skipping 408 matching lines @@
 }  // namespace internal
 
 RenderText::~RenderText() {
 }
 
 RenderText* RenderText::CreateInstance() {
 #if defined(OS_MACOSX) && defined(TOOLKIT_VIEWS)
   // Use the more complete HarfBuzz implementation for Views controls on Mac.
   return new RenderTextHarfBuzz;
 #else
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableHarfBuzzRenderText)) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableHarfBuzzRenderText)) {
     return new RenderTextHarfBuzz;
   }
   return CreateNativeInstance();
 #endif
 }
 
 void RenderText::SetText(const base::string16& text) {
   DCHECK(!composition_range_.IsValid());
   if (text_ == text)
     return;
@@ skipping 1004 matching lines @@
   cursor_bounds_ += delta_offset;
 }
 
 void RenderText::DrawSelection(Canvas* canvas) {
   const std::vector<Rect> sel = GetSubstringBounds(selection());
   for (std::vector<Rect>::const_iterator i = sel.begin(); i < sel.end(); ++i)
     canvas->FillRect(*i, selection_background_focused_color_);
 }
 
 }  // namespace gfx