# we don't support trace_event on libchrome

--- a/base/values.cc
+++ b/base/values.cc
@@ -18,7 +18,8 @@
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
-#include "base/trace_event/memory_usage_estimator.h"
+// Unsupported in libchrome
+// #include "base/trace_event/memory_usage_estimator.h"
 
 namespace base {
 
@@ -632,20 +633,21 @@ bool Value::Equals(const Value* other) const {
   return *this == *other;
 }
 
-size_t Value::EstimateMemoryUsage() const {
-  switch (type_) {
-    case Type::STRING:
-      return base::trace_event::EstimateMemoryUsage(string_value_);
-    case Type::BINARY:
-      return base::trace_event::EstimateMemoryUsage(binary_value_);
-    case Type::DICTIONARY:
-      return base::trace_event::EstimateMemoryUsage(dict_);
-    case Type::LIST:
-      return base::trace_event::EstimateMemoryUsage(list_);
-    default:
-      return 0;
-  }
-}
+// Unsupported in libchrome
+// size_t Value::EstimateMemoryUsage() const {
+//   switch (type_) {
+//     case Type::STRING:
+//       return base::trace_event::EstimateMemoryUsage(string_value_);
+//     case Type::BINARY:
+//       return base::trace_event::EstimateMemoryUsage(binary_value_);
+//     case Type::DICTIONARY:
+//       return base::trace_event::EstimateMemoryUsage(dict_);
+//     case Type::LIST:
+//       return base::trace_event::EstimateMemoryUsage(list_);
+//     default:
+//       return 0;
+//   }
+// }
 
 void Value::InternalMoveConstructFrom(Value&& that) {
   type_ = that.type_;

--- a/base/values.h
+++ b/base/values.h
@@ -352,7 +352,7 @@ class BASE_EXPORT Value {
 
   // Estimates dynamic memory usage.
   // See base/trace_event/memory_usage_estimator.h for more info.
-  size_t EstimateMemoryUsage() const;
+  // size_t EstimateMemoryUsage() const;
 
  protected:
   // TODO(crbug.com/646113): Make these private once DictionaryValue and