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

cc/render_pass.cc

 // Copyright 2011 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 "cc/render_pass.h"
 
-#include "third_party/skia/include/core/SkImageFilter.h"
-
 namespace cc {
 
 scoped_ptr<RenderPass> RenderPass::Create() {
   return make_scoped_ptr(new RenderPass);
 }
 
 RenderPass::RenderPass()
     : id(Id(-1, -1)),
       has_transparent_background(true),
-      has_occlusion_from_outside_target_surface(false),
-      filter(NULL) {
+      has_occlusion_from_outside_target_surface(false) {
 }
 
 RenderPass::~RenderPass() {
-  SkSafeUnref(filter);
 }
 
 scoped_ptr<RenderPass> RenderPass::Copy(Id new_id) const {
   DCHECK(new_id != id);
 
   scoped_ptr<RenderPass> copy_pass(Create());
   copy_pass->SetAll(new_id,
                     output_rect,
                     damage_rect,
                     transform_to_root_target,
@@ skipping 21 matching lines @@
   DCHECK(shared_quad_state_list.isEmpty());
 }
 
 void RenderPass::SetAll(Id id,
                         gfx::Rect output_rect,
                         gfx::RectF damage_rect,
                         const gfx::Transform& transform_to_root_target,
                         bool has_transparent_background,
                         bool has_occlusion_from_outside_target_surface,
                         const WebKit::WebFilterOperations& filters,
-                        SkImageFilter* filter,
+                        const SkiaRefPtr<SkImageFilter>& filter,
                         const WebKit::WebFilterOperations& background_filters) {
   DCHECK_GT(id.layer_id, 0);
   DCHECK_GE(id.index, 0);
 
   this->id = id;
   this->output_rect = output_rect;
   this->damage_rect = damage_rect;
   this->transform_to_root_target = transform_to_root_target;
   this->has_transparent_background = has_transparent_background;
   this->has_occlusion_from_outside_target_surface =
       has_occlusion_from_outside_target_surface;
   this->filters = filters;
-  SkRefCnt_SafeAssign(this->filter, filter);
+  this->filter = filter;
   this->background_filters = background_filters;
 
   DCHECK(quad_list.isEmpty());
   DCHECK(shared_quad_state_list.isEmpty());
 }
 
 }  // namespace cc