cc: Add frame data to LTHI tracing

cc/debug/traced_value.cc

Index: cc/debug/traced_value.cc
diff --git a/cc/debug/traced_value.cc b/cc/debug/traced_value.cc
index 637c700552571c2ffe0e63dfe630e0d77cd84283..fbca5c60c8073a0e6df6bb1530cd055b6a0f2386 100644
--- a/cc/debug/traced_value.cc
+++ b/cc/debug/traced_value.cc
@@ -21,6 +21,15 @@ void TracedValue::MakeDictIntoImplicitSnapshot(
   dict->SetString("id", base::StringPrintf("%s/%p", object_name, id));
 }
 
+void TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
+    const char* category,
+    base::DictionaryValue* dict,
+    const char* object_name,
+    const void* id) {
+  dict->SetString("cat", category);
+  MakeDictIntoImplicitSnapshot(dict, object_name, id);
+}
+
 scoped_ptr<base::debug::ConvertableToTraceFormat> TracedValue::FromValue(
     base::Value* value) {
   TracedValue* ptr = new TracedValue(value);