Remove memory_watcher tool as well as --memory-profile command line flag.

tools/memory_watcher/memory_hook.h

-// Copyright (c) 2006-2008 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.
-//
-// Static class for hooking Win32 API routines.  For now,
-// we only add one watcher at a time.
-//
-// TODO(mbelshe):  Support multiple watchers.
-
-#ifndef MEMORY_WATCHER_MEMORY_HOOK_
-#define MEMORY_WATCHER_MEMORY_HOOK_
-
-#include "base/logging.h"
-
-// When allocating memory for internal use with the MemoryHook,
-// we must always use the MemoryHook's heap; otherwise, the memory
-// gets tracked, and it becomes an infinite loop (allocation() calls
-// MemoryHook() which calls allocation(), etc).
-//
-// PrivateHookAllocator is an STL-friendly Allocator so that STL lists,
-// maps, etc can be used on the global MemoryHook's heap.
-template <class T>
-class PrivateHookAllocator {
- public:
-  // These type definitions are needed for stl allocators.
-  typedef size_t    size_type;
-  typedef ptrdiff_t difference_type;
-  typedef T*        pointer;
-  typedef const T*  const_pointer;
-  typedef T&        reference;
-  typedef const T&  const_reference;
-  typedef T         value_type;
-
-  PrivateHookAllocator() {}
-
-  // Allocate memory for STL.
-  pointer allocate(size_type n, const void * = 0) {
-    return reinterpret_cast<T*>(MemoryHook::Alloc(n * sizeof(T)));
-  }
-
-  // Deallocate memory for STL.
-  void deallocate(void* p, size_type) {
-    if (p)
-      MemoryHook::Free(p);
-  }
-
-  // Construct the object
-  void construct(pointer p, const T& val) {
-    new (reinterpret_cast<T*>(p))T(val);
-  }
-
-  // Destruct an object
-  void destroy(pointer p) { p->~T(); }
-
-  size_type max_size() const { return size_t(-1); }
-
-  template <class U>
-  struct rebind { typedef PrivateHookAllocator<U> other; };
-
-  template <class U>
-  PrivateHookAllocator(const PrivateHookAllocator<U>&) {}
-};
-
-template<class T, class U> inline
-bool operator==(const PrivateHookAllocator<T>&,
-                const PrivateHookAllocator<U>&) {
-  return (true);
-}
-
-template<class T, class U> inline
-bool operator!=(const PrivateHookAllocator<T>& left,
-                const PrivateHookAllocator<U>& right) {
-  return (!(left == right));
-}
-
-
-// Classes which monitor memory from these hooks implement
-// the MemoryObserver interface.
-class MemoryObserver {
- public:
-  virtual ~MemoryObserver() {}
-
-  // Track a pointer.  Will capture the current StackTrace.
-  virtual void OnTrack(HANDLE heap, int32 id, int32 size) = 0;
-
-  // Untrack a pointer, removing it from our list.
-  virtual void OnUntrack(HANDLE heap, int32 id, int32 size) = 0;
-};
-
-class MemoryHook : MemoryObserver {
- public:
-  // Initialize the MemoryHook.  Must be called before
-  // registering watchers.  This can be called repeatedly,
-  // but is not thread safe.
-  static bool Initialize();
-
-  // Returns true is memory allocations and deallocations
-  // are being traced.
-  static bool hooked() { return hooked_ != NULL; }
-
-  // Register a class to receive memory allocation & deallocation
-  // callbacks.  If we haven't hooked memory yet, this call will
-  // force memory hooking to start.
-  static bool RegisterWatcher(MemoryObserver* watcher);
-
-  // Register a class to stop receiving callbacks.  If there are
-  // no more watchers, this call will unhook memory.
-  static bool UnregisterWatcher(MemoryObserver* watcher);
-
-  // MemoryHook provides a private heap for allocating
-  // unwatched memory.
-  static void* Alloc(size_t size) {
-    DCHECK(global_hook_ && global_hook_->heap_);
-    return HeapAlloc(global_hook_->heap_, 0, size);
-  }
-  static void Free(void* ptr) {
-    DCHECK(global_hook_ && global_hook_->heap_);
-    HeapFree(global_hook_->heap_, 0, ptr);
-  }
-
-  // Access the global hook.  For internal use only from static "C"
-  // hooks.
-  static MemoryHook* hook() { return global_hook_; }
-
-  // MemoryObserver interface.
-  virtual void OnTrack(HANDLE hHeap, int32 id, int32 size);
-  virtual void OnUntrack(HANDLE hHeap, int32 id, int32 size);
-
- private:
-  MemoryHook();
-  ~MemoryHook();
-
-  // Enable memory tracing.  When memory is 'hooked',
-  // MemoryWatchers which have registered will be called
-  // as memory is allocated and deallocated.
-  static bool Hook();
-
-  // Disables memory tracing.
-  static bool Unhook();
-
-  // Create our private heap
-  bool CreateHeap();
-
-  // Close our private heap.
-  bool CloseHeap();
-
-  MemoryObserver* watcher_;
-  HANDLE heap_;   // An internal accounting heap.
-  static bool hooked_;
-  static MemoryHook* global_hook_;
-};
-
-#endif  // MEMORY_WATCHER_MEMORY_HOOK_