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

skia/ext/vector_platform_device_emf_win.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 "skia/ext/vector_platform_device_emf_win.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "base/string16.h"
@@ skipping 172 matching lines @@
     // Draw a path instead.
     SkPath path_orginal;
     path_orginal.addRect(rect);
 
     // Apply the path effect to the rect.
     SkPath path_modified;
     paint.getFillPath(path_orginal, &path_modified);
 
     // Removes the path effect from the temporary SkPaint object.
     SkPaint paint_no_effet(paint);
-    SkSafeUnref(paint_no_effet.setPathEffect(NULL));
+    paint_no_effet.setPathEffect(NULL);
 
     // Draw the calculated path.
     drawPath(draw, path_modified, paint_no_effet);
     return;
   }
 
   if (!ApplyPaint(paint)) {
     return;
   }
   HDC dc = BeginPlatformPaint();
@@ skipping 13 matching lines @@
                                        const SkMatrix* prePathMatrix,
                                        bool pathIsMutable) {
   CHECK_FOR_NODRAW_ANNOTATION(paint);
   if (paint.getPathEffect()) {
     // Apply the path effect forehand.
     SkPath path_modified;
     paint.getFillPath(path, &path_modified);
 
     // Removes the path effect from the temporary SkPaint object.
     SkPaint paint_no_effet(paint);
-    SkSafeUnref(paint_no_effet.setPathEffect(NULL));
+    paint_no_effet.setPathEffect(NULL);
 
     // Draw the calculated path.
     drawPath(draw, path_modified, paint_no_effet);
     return;
   }
 
   if (!ApplyPaint(paint)) {
     return;
   }
   HDC dc = BeginPlatformPaint();
@@ skipping 683 matching lines @@
                                 pixels,
                                 reinterpret_cast<const BITMAPINFO*>(&hdr),
                                 DIB_RGB_COLORS,
                                 SRCCOPY);
   }
   EndPlatformPaint();
   Cleanup();
 }
 
 }  // namespace skia