Add builders for tracing event's structural arguments

cc/debug/traced_value.cc

 // Copyright (c) 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/debug/traced_value.h"
 
+#include "base/debug/trace_event_argument.h"
 #include "base/json/json_writer.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 
 namespace cc {
 
 scoped_ptr<base::Value> TracedValue::CreateIDRef(const void* id) {
   scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
   res->SetString("id_ref", base::StringPrintf("%p", id));
   return res.PassAs<base::Value>();
@@ skipping 17 matching lines @@
     const char* category,
     base::DictionaryValue* dict,
     const char* object_base_type_name,
     const char* object_name,
     const void* id) {
   dict->SetString("cat", category);
   dict->SetString("base_type", object_base_type_name);
   MakeDictIntoImplicitSnapshot(dict, object_name, id);
 }
 
+void TracedValue::AppendIDRef(const void* id, base::debug::TracedValue* state) {
+  state->BeginDictionary();
+  state->SetString("id_ref", base::StringPrintf("%p", id));
+  state->EndDictionary();
+}
+
+void TracedValue::SetIDRef(const void* id,
+                           base::debug::TracedValue* state,
+                           const char* name) {
+  state->BeginDictionary(name);
+  state->SetString("id_ref", base::StringPrintf("%p", id));
+  state->EndDictionary();
+}
+
+void TracedValue::MakeDictIntoImplicitSnapshot(base::debug::TracedValue* dict,
+                                               const char* object_name,
+                                               const void* id) {
+  dict->SetString("id", base::StringPrintf("%s/%p", object_name, id));
+}
+
+void TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
+    const char* category,
+    base::debug::TracedValue* dict,
+    const char* object_name,
+    const void* id) {
+  dict->SetString("cat", category);
+  MakeDictIntoImplicitSnapshot(dict, object_name, id);
+}
+
+void TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
+    const char* category,
+    base::debug::TracedValue* dict,
+    const char* object_base_type_name,
+    const char* object_name,
+    const void* id) {
+  dict->SetString("cat", category);
+  dict->SetString("base_type", object_base_type_name);
+  MakeDictIntoImplicitSnapshot(dict, object_name, id);
+}
+
 scoped_refptr<base::debug::ConvertableToTraceFormat> TracedValue::FromValue(
     base::Value* value) {
   return scoped_refptr<base::debug::ConvertableToTraceFormat>(
       new TracedValue(value));
 }
 
 TracedValue::TracedValue(base::Value* value)
   : value_(value) {
 }
 
 TracedValue::~TracedValue() {
 }
 
 void TracedValue::AppendAsTraceFormat(std::string* out) const {
   std::string tmp;
   base::JSONWriter::Write(value_.get(), &tmp);
   *out += tmp;
 }
 
 }  // namespace cc