Add builders for tracing event's structural arguments

cc/output/filter_operations.cc

 // Copyright 2013 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/output/filter_operations.h"
+
 #include <cmath>
 
-#include "cc/output/filter_operations.h"
-
+#include "base/debug/trace_event_argument.h"
 #include "base/values.h"
 #include "cc/output/filter_operation.h"
 
 namespace cc {
 
 FilterOperations::FilterOperations() {}
 
 FilterOperations::FilterOperations(const FilterOperations& other)
     : operations_(other.operations_) {}
 
@@ skipping 170 matching lines @@
           FilterOperation::Blend(&from.at(i), NULL, progress));
     }
   } else {
     for (size_t i = shorter_size; i < longer_size; i++)
       blended_filters.Append(FilterOperation::Blend(NULL, &at(i), progress));
   }
 
   return blended_filters;
 }
 
-scoped_ptr<base::Value> FilterOperations::AsValue() const {
-  scoped_ptr<base::ListValue> value(new base::ListValue);
-  for (size_t i = 0; i < operations_.size(); ++i)
-    value->Append(operations_[i].AsValue().release());
-  return value.PassAs<base::Value>();
+void FilterOperations::AsValueInto(base::debug::TracedValue* value) const {
+  for (size_t i = 0; i < operations_.size(); ++i) {
+    value->BeginDictionary();
+    operations_[i].AsValueInto(value);
+    value->EndDictionary();
+  }
 }
 
 }  // namespace cc