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

content/renderer/render_widget.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 "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 656 matching lines @@
     rasterize_begin_ticks = base::TimeTicks::HighResNow();
   canvas->save();
 
   // Bring the canvas into the coordinate system of the paint rect.
   canvas->translate(static_cast<SkScalar>(-canvas_origin.x()),
                     static_cast<SkScalar>(-canvas_origin.y()));
 
   // If there is a custom background, tile it.
   if (!background_.empty()) {
     SkPaint paint;
-    SkShader* shader = SkShader::CreateBitmapShader(background_,
-                                                    SkShader::kRepeat_TileMode,
-                                                    SkShader::kRepeat_TileMode);
-    paint.setShader(shader)->unref();
+    skia::RefPtr<SkShader> shader = SkShader::CreateBitmapShader(
+        background_, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
+    paint.setShader(shader.get());
 
     // Use kSrc_Mode to handle background_ transparency properly.
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
 
     // Canvas could contain multiple update rects. Clip to given rect so that
     // we don't accidentally clear other update rects.
     canvas->save();
     canvas->clipRect(gfx::RectToSkRect(rect));
     canvas->drawPaint(paint);
     canvas->restore();
@@ skipping 1271 matching lines @@
 bool RenderWidget::WillHandleGestureEvent(
     const WebKit::WebGestureEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }
 
 }  // namespace content