Allocator cleanup: allocator_extension call directly into tcmalloc

base/allocator/allocator_extension.h

 // Copyright (c) 2012 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_ALLOCATOR_ALLOCATOR_EXTENSION_H_
 #define BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_
 
 #include <stddef.h> // for size_t
 
 #include "base/base_export.h"
 #include "build/build_config.h"
 
 namespace base {
 namespace allocator {
 
-typedef void (*ReleaseFreeMemoryFunction)();
-typedef bool (*GetNumericPropertyFunction)(const char* name, size_t* value);
-
 // Request that the allocator release any free memory it knows about to the
 // system.
 BASE_EXPORT void ReleaseFreeMemory();
 
 // Get the named property's |value|. Returns true if the property is known.
 // Returns false if the property is not a valid property name for the current
 // allocator implementation.
 // |name| or |value| cannot be NULL
 BASE_EXPORT bool GetNumericProperty(const char* name, size_t* value);
 
-// These settings allow specifying a callback used to implement the allocator
-// extension functions.  These are optional, but if set they must only be set
-// once.  These will typically called in an allocator-specific initialization
-// routine.
-//
-// No threading promises are made.  The caller is responsible for making sure
-// these pointers are set before any other threads attempt to call the above
-// functions.
-
-BASE_EXPORT void SetReleaseFreeMemoryFunction(
-    ReleaseFreeMemoryFunction release_free_memory_function);
-
-BASE_EXPORT void SetGetNumericPropertyFunction(
-    GetNumericPropertyFunction get_numeric_property_function);
+BASE_EXPORT bool IsHeapProfilerRunning();
 
 }  // namespace allocator
 }  // namespace base
 
 #endif  // BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_