Update from https://crrev.com/328418

base/trace_event/memory_allocator_attributes_type_info.h

Index: base/trace_event/memory_allocator_attributes_type_info.h
diff --git a/base/trace_event/memory_allocator_attributes_type_info.h b/base/trace_event/memory_allocator_attributes_type_info.h
deleted file mode 100644
index c3986ae2e8eda9326b97a88c28d50fd86df62314..0000000000000000000000000000000000000000
--- a/base/trace_event/memory_allocator_attributes_type_info.h
+++ /dev/null
@@ -1,49 +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.
-
-#ifndef BASE_TRACE_EVENT_MEMORY_ALLOCATOR_ATTRIBUTES_TYPE_INFO_H_
-#define BASE_TRACE_EVENT_MEMORY_ALLOCATOR_ATTRIBUTES_TYPE_INFO_H_
-
-#include <string>
-
-#include "base/base_export.h"
-#include "base/containers/hash_tables.h"
-
-namespace base {
-namespace trace_event {
-
-// A dictionary of "allocator_name/attribute_name" -> "attribute_type" which
-// supports merging and enforces duplicate checking.
-class BASE_EXPORT MemoryAllocatorAttributesTypeInfo {
- public:
-  MemoryAllocatorAttributesTypeInfo();
-  ~MemoryAllocatorAttributesTypeInfo();
-
-  // Returns the attribute type, or an empty string if not found.
-  const std::string& Get(const std::string& allocator_name,
-                         const std::string& attribute_name) const;
-
-  // Refer to tools/perf/unit-info.json for the semantics of |attribute_type|.
-  void Set(const std::string& allocator_name,
-           const std::string& attribute_name,
-           const std::string& attribute_type);
-
-  // Checks whether a given {allocator_name, attribute_name} declaration exists.
-  bool Exists(const std::string& allocator_name,
-              const std::string& attribute_name) const;
-
-  // Merges the attribute types declared in |other| into this.
-  void Update(const MemoryAllocatorAttributesTypeInfo& other);
-
- private:
-  // "allocator_name/attribute_name" -> attribute_type.
-  hash_map<std::string, std::string> type_info_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryAllocatorAttributesTypeInfo);
-};
-
-}  // namespace trace_event
-}  // namespace base
-
-#endif  // BASE_TRACE_EVENT_MEMORY_ALLOCATOR_ATTRIBUTES_TYPE_INFO_H_