Revert of components/metrics: Add runtime memory leak detector

components/metrics/leak_detector/stl_allocator.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 COMPONENTS_METRICS_LEAK_DETECTOR_STL_ALLOCATOR_H_
-#define COMPONENTS_METRICS_LEAK_DETECTOR_STL_ALLOCATOR_H_
-
-#include <stddef.h>
-
-#include <limits>
-#include <memory>
-
-#include "base/logging.h"
-
-// Generic allocator class for STL objects.
-// deallocate() to use the template class Alloc's allocation.
-// that uses a given type-less allocator Alloc, which must provide:
-//   static void* Alloc::Allocate(size_t size);
-//   static void Alloc::Free(void* ptr, size_t size);
-//
-// Inherits from the default allocator, std::allocator. Overrides allocate() and
-// deallocate() and some other functions.
-//
-// STLAllocator<T, MyAlloc> provides the same thread-safety guarantees as
-// MyAlloc.
-//
-// Usage example:
-//   set<T, less<T>, STLAllocator<T, MyAlloc> > my_set;
-
-template <typename T, class Alloc>
-class STLAllocator : public std::allocator<T> {
- public:
-  typedef size_t size_type;
-  typedef T* pointer;
-
-  template <class T1>
-  struct rebind {
-    typedef STLAllocator<T1, Alloc> other;
-  };
-
-  STLAllocator() {}
-  explicit STLAllocator(const STLAllocator&) {}
-  template <class T1>
-  STLAllocator(const STLAllocator<T1, Alloc>&) {}
-  ~STLAllocator() {}
-
-  pointer allocate(size_type n, const void* = 0) {
-    // Make sure the computation of the total allocation size does not cause an
-    // integer overflow.
-    RAW_CHECK(n < max_size());
-    return static_cast<T*>(Alloc::Allocate(n * sizeof(T)));
-  }
-
-  void deallocate(pointer p, size_type n) { Alloc::Free(p, n * sizeof(T)); }
-
-  size_type max_size() const {
-    return std::numeric_limits<size_t>::max() / sizeof(T);
-  }
-};
-
-#endif  // COMPONENTS_METRICS_LEAK_DETECTOR_STL_ALLOCATOR_H_