Update from https://crrev.com/328418

base/trace_event/memory_allocator_attributes_type_info.cc

Index: base/trace_event/memory_allocator_attributes_type_info.cc
diff --git a/base/trace_event/memory_allocator_attributes_type_info.cc b/base/trace_event/memory_allocator_attributes_type_info.cc
deleted file mode 100644
index 7d1e61cada7f3423a2d48e7b188fbf13b8195f2c..0000000000000000000000000000000000000000
--- a/base/trace_event/memory_allocator_attributes_type_info.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2015 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 "base/trace_event/memory_allocator_attributes_type_info.h"
-
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-
-namespace base {
-namespace trace_event {
-
-namespace {
-base::LazyInstance<const std::string> kNotFound = LAZY_INSTANCE_INITIALIZER;
-
-std::string GetKey(const std::string& allocator_name,
-                   const std::string& attribute_name) {
-  return allocator_name + "/" + attribute_name;
-}
-}  // namespace
-
-MemoryAllocatorAttributesTypeInfo::MemoryAllocatorAttributesTypeInfo() {
-}
-
-MemoryAllocatorAttributesTypeInfo::~MemoryAllocatorAttributesTypeInfo() {
-}
-
-const std::string& MemoryAllocatorAttributesTypeInfo::Get(
-    const std::string& allocator_name,
-    const std::string& attribute_name) const {
-  auto it = type_info_map_.find(GetKey(allocator_name, attribute_name));
-  if (it == type_info_map_.end())
-    return kNotFound.Get();
-  return it->second;
-}
-
-void MemoryAllocatorAttributesTypeInfo::Set(const std::string& allocator_name,
-                                            const std::string& attribute_name,
-                                            const std::string& attribute_type) {
-  std::string key = GetKey(allocator_name, attribute_name);
-  DCHECK_EQ(0u, type_info_map_.count(key));
-  type_info_map_[key] = attribute_type;
-}
-
-bool MemoryAllocatorAttributesTypeInfo::Exists(
-    const std::string& allocator_name,
-    const std::string& attribute_name) const {
-  return type_info_map_.count(GetKey(allocator_name, attribute_name)) == 1;
-}
-
-void MemoryAllocatorAttributesTypeInfo::Update(
-    const MemoryAllocatorAttributesTypeInfo& other) {
-  for (auto it = other.type_info_map_.begin();
-       it != other.type_info_map_.end(); ++it) {
-    bool no_duplicates = type_info_map_.insert(*it).second;
-    DCHECK(no_duplicates) << "Duplicated allocator attribute " << it->first;
-  }
-}
-
-}  // namespace trace_event
-}  // namespace base