switch colorfilters to sk_sp

tools/debugger/SkDrawCommand.cpp

Index: tools/debugger/SkDrawCommand.cpp
diff --git a/tools/debugger/SkDrawCommand.cpp b/tools/debugger/SkDrawCommand.cpp
index 5bacf02b1a2e0bfaf6f59923d14db80eee9cdbe8..5dc6079897c21bc6807c7181404650f1af72fb7b 100644
--- a/tools/debugger/SkDrawCommand.cpp
+++ b/tools/debugger/SkDrawCommand.cpp
@@ -1159,11 +1159,10 @@ static void extract_json_paint_colorfilter(Json::Value& jsonPaint, UrlDataManage
                                            SkPaint* target) {
     if (jsonPaint.isMember(SKDEBUGCANVAS_ATTRIBUTE_COLORFILTER)) {
         Json::Value jsonColorFilter = jsonPaint[SKDEBUGCANVAS_ATTRIBUTE_COLORFILTER];
-        SkColorFilter* colorFilter = (SkColorFilter*) load_flattenable(jsonColorFilter, 
-                                                                       urlDataManager);
+        sk_sp<SkColorFilter> colorFilter((SkColorFilter*)load_flattenable(jsonColorFilter,
+                                                                          urlDataManager));
         if (colorFilter != nullptr) {
             target->setColorFilter(colorFilter);
-            colorFilter->unref();
         }
     }
 }