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

ui/gfx/canvas_skia.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/canvas.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/font_list.h"
@@ skipping 125 matching lines @@
   }
 
   if (flags & Canvas::TEXT_ALIGN_RIGHT)
     render_text->SetHorizontalAlignment(ALIGN_RIGHT);
   else if (flags & Canvas::TEXT_ALIGN_CENTER)
     render_text->SetHorizontalAlignment(ALIGN_CENTER);
   else
     render_text->SetHorizontalAlignment(ALIGN_LEFT);
 
   if (flags & Canvas::NO_SUBPIXEL_RENDERING)
-    render_text->set_background_is_transparent(true);
+    render_text->set_subpixel_rendering_enabled(false);
 
   render_text->SetColor(color);
   const int font_style = font_list.GetFontStyle();
   render_text->SetStyle(BOLD, (font_style & Font::BOLD) != 0);
   render_text->SetStyle(ITALIC, (font_style & Font::ITALIC) != 0);
   render_text->SetStyle(UNDERLINE, (font_style & Font::UNDERLINE) != 0);
 }
 
 }  // namespace
 
@@ skipping 238 matching lines @@
   UpdateRenderText(rect, text, font_list, flags, color, render_text.get());
   render_text->SetElideBehavior(FADE_TAIL);
 
   canvas_->save();
   ClipRect(display_rect);
   render_text->Draw(this);
   canvas_->restore();
 }
 
 }  // namespace gfx