Cleanup: LFH only needs to be enabled on XP/2003

base/process/memory_win.cc

 // Copyright (c) 2013 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.
 
 #include "base/process/memory.h"
 
 #include <new.h>
 #include <psapi.h>
 #include <stddef.h>
 
@@ skipping 32 matching lines @@
   return 0;
 }
 
 #pragma warning(pop)
 
 // HeapSetInformation function pointer.
 typedef BOOL (WINAPI* HeapSetFn)(HANDLE, HEAP_INFORMATION_CLASS, PVOID, SIZE_T);
 
 }  // namespace
 
-bool EnableLowFragmentationHeap() {
-  HMODULE kernel32 = GetModuleHandle(L"kernel32.dll");
-  HeapSetFn heap_set = reinterpret_cast<HeapSetFn>(GetProcAddress(
-      kernel32,
-      "HeapSetInformation"));
-
-  // On Windows 2000, the function is not exported. This is not a reason to
-  // fail.
-  if (!heap_set)
-    return true;
-
-  unsigned number_heaps = GetProcessHeaps(0, NULL);
-  if (!number_heaps)
-    return false;
-
-  // Gives us some extra space in the array in case a thread is creating heaps
-  // at the same time we're querying them.
-  static const int MARGIN = 8;
-  scoped_ptr<HANDLE[]> heaps(new HANDLE[number_heaps + MARGIN]);
-  number_heaps = GetProcessHeaps(number_heaps + MARGIN, heaps.get());
-  if (!number_heaps)
-    return false;
-
-  for (unsigned i = 0; i < number_heaps; ++i) {
-    ULONG lfh_flag = 2;
-    // Don't bother with the result code. It may fails on heaps that have the
-    // HEAP_NO_SERIALIZE flag. This is expected and not a problem at all.
-    heap_set(heaps[i],
-             HeapCompatibilityInformation,
-             &lfh_flag,
-             sizeof(lfh_flag));
-  }
-  return true;
-}
-
 void EnableTerminationOnHeapCorruption() {
   // Ignore the result code. Supported on XP SP3 and Vista.
   HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
 }
 
 void EnableTerminationOnOutOfMemory() {
   _set_new_handler(&OnNoMemory);
   _set_new_mode(1);
 }
 
 HMODULE GetModuleFromAddress(void* address) {
   HMODULE instance = NULL;
   if (!::GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
                             GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
                             static_cast<char*>(address),
                             &instance)) {
     NOTREACHED();
   }
   return instance;
 }
 
 // Implemented using a weak symbol.
 bool UncheckedMalloc(size_t size, void** result) {
   *result = malloc_unchecked(size);
   return *result != NULL;
 }
 
 }  // namespace base