Update from https://crrev.com/320931

base/location.cc

 // Copyright (c) 2012 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 "build/build_config.h"
 
 #if defined(COMPILER_MSVC)
 #include <intrin.h>
 #endif
 
@@ skipping 13 matching lines @@
       program_counter_(program_counter) {
 }
 
 Location::Location()
     : function_name_("Unknown"),
       file_name_("Unknown"),
       line_number_(-1),
       program_counter_(NULL) {
 }
 
+Location::Location(const Location& other)
+    : function_name_(other.function_name_),
+      file_name_(other.file_name_),
+      line_number_(other.line_number_),
+      program_counter_(other.program_counter_) {
+}
+
 std::string Location::ToString() const {
   return std::string(function_name_) + "@" + file_name_ + ":" +
       base::IntToString(line_number_);
 }
 
 void Location::Write(bool display_filename, bool display_function_name,
                      std::string* output) const {
   base::StringAppendF(output, "%s[%d] ",
       display_filename ? file_name_ : "line",
       line_number_);
@@ skipping 46 matching lines @@
 #if defined(COMPILER_MSVC)
   return _ReturnAddress();
 #elif defined(COMPILER_GCC) && !defined(OS_NACL)
   return __builtin_extract_return_addr(__builtin_return_address(0));
 #else
   return NULL;
 #endif
 }
 
 }  // namespace tracked_objects