Add skia::RefPtr class to wrap ref counted classes from Skia.

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 "base/i18n/break_iterator.h"
 #include "base/logging.h"
@@ skipping 907 matching lines @@
   const SkColor color = default_style().foreground;
   SkShader* shader = CreateFadeShader(text_rect, left_part, right_part, color);
   SkAutoUnref auto_unref(shader);
   if (shader) {
     // |renderer| adds its own ref. So don't |release()| it from the ref ptr.
     renderer->SetShader(shader, display_rect());
   }
 }
 
 void RenderText::ApplyTextShadows(internal::SkiaTextRenderer* renderer) {
-  SkDrawLooper* looper = gfx::CreateShadowDrawLooper(text_shadows_);
-  SkAutoUnref auto_unref(looper);
-  renderer->SetDrawLooper(looper);
+  skia::RefPtr<SkDrawLooper> looper =
+      gfx::CreateShadowDrawLooper(text_shadows_);
+  renderer->SetDrawLooper(looper.get());
 }
 
 // static
 bool RenderText::RangeContainsCaret(const ui::Range& range,
                                     size_t caret_pos,
                                     LogicalCursorDirection caret_affinity) {
   // NB: exploits unsigned wraparound (WG14/N1124 section 6.2.5 paragraph 9).
   size_t adjacent = (caret_affinity == CURSOR_BACKWARD) ?
       caret_pos - 1 : caret_pos + 1;
   return range.Contains(ui::Range(caret_pos, adjacent));
@@ skipping 78 matching lines @@
   if (cursor_enabled() && cursor_visible() && focused()) {
     const Rect& bounds = GetUpdatedCursorBounds();
     if (bounds.width() != 0)
       canvas->FillRect(bounds, cursor_color_);
     else
       canvas->DrawRect(bounds, cursor_color_);
   }
 }
 
 }  // namespace gfx