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

ui/views/touchui/touch_selection_controller_impl.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/views/touchui/touch_selection_controller_impl.h"
 
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "grit/ui_strings.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
@@ skipping 235 matching lines @@
 
     static const SkScalar kGradientPoints[2] = {
         SkIntToScalar(0),
         SkIntToScalar(1)
     };
 
     SkPoint points[2];
     points[0].iset(0, 0);
     points[1].iset(0, height());
 
-    SkShader* shader = SkGradientShader::CreateLinear(points,
+    skia::RefPtr<SkShader> shader = SkGradientShader::CreateLinear(points,
         kGradientColors, kGradientPoints, arraysize(kGradientPoints),
         SkShader::kRepeat_TileMode);
     DCHECK(shader);
 
     SkPaint paint;
-    paint.setShader(shader);
-    shader->unref();
+    paint.setShader(shader.get());
 
     paint.setStyle(SkPaint::kFill_Style);
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
 
     canvas->DrawRect(GetLocalBounds(), paint);
 #else
     canvas->DrawColor(SkColorSetRGB(210, 225, 246),
                                    SkXfermode::kSrc_Mode);
 #endif
   }
@@ skipping 213 matching lines @@
 bool TouchSelectionControllerImpl::IsSelectionHandle2Visible() {
   return selection_handle_2_->visible();
 }
 
 TouchSelectionController* TouchSelectionController::create(
     TouchSelectionClientView* client_view) {
   return new TouchSelectionControllerImpl(client_view);
 }
 
 }  // namespace views