Switch to standard integer types in base/trace_event/.

base/trace_event/heap_profiler_allocation_context.h

 // 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_HEAP_PROFILER_ALLOCATION_CONTEXT_H_
 #define BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_H_
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include "base/base_export.h"
 #include "base/containers/hash_tables.h"
 
 namespace base {
 namespace trace_event {
 
 // When heap profiling is enabled, tracing keeps track of the allocation
 // context for each allocation intercepted. It is generated by the
@@ skipping 69 matching lines @@
 };
 
 template <>
 struct BASE_EXPORT hash<base::trace_event::AllocationContext> {
   size_t operator()(const base::trace_event::AllocationContext& context) const;
 };
 
 }  // BASE_HASH_NAMESPACE
 
 #endif  // BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_H_