allocator/Windows: delete the old non-unified allocator-shim

base/security_unittest.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 <fcntl.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
 #include <algorithm>
 #include <limits>
 #include <memory>
 
+#include "base/allocator/features.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/memory/free_deleter.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_POSIX)
 #include <sys/mman.h>
 #include <unistd.h>
 #endif
@@ skipping 10 matching lines @@
 template <typename Type>
 NOINLINE Type HideValueFromCompiler(volatile Type value) {
 #if defined(__GNUC__)
   // In a GCC compatible compiler (GCC or Clang), make this compiler barrier
   // more robust than merely using "volatile".
   __asm__ volatile ("" : "+r" (value));
 #endif  // __GNUC__
   return value;
 }
 
-// Tcmalloc and Windows allocator shim support setting malloc limits.
+// TCmalloc, currently supported only by Linux/CrOS, supports malloc limits.
 // - NO_TCMALLOC (should be defined if compiled with use_allocator!="tcmalloc")
-// - ADDRESS_SANITIZER and SYZYASAN because they have their own memory allocator
-// - IOS does not use tcmalloc
-// - OS_MACOSX does not use tcmalloc
-// - Windows allocator shim defines ALLOCATOR_SHIM
-#if (!defined(NO_TCMALLOC) || defined(ALLOCATOR_SHIM)) &&                     \
-    !defined(ADDRESS_SANITIZER) && !defined(OS_IOS) && !defined(OS_MACOSX) && \
-    !defined(SYZYASAN)
+// - ADDRESS_SANITIZER it has its own memory allocator
+#if defined(OS_LINUX) && !defined(NO_TCMALLOC) && !defined(ADDRESS_SANITIZER)
 #define MALLOC_OVERFLOW_TEST(function) function
 #else
 #define MALLOC_OVERFLOW_TEST(function) DISABLED_##function
 #endif
 
 #if defined(OS_LINUX) && defined(__x86_64__)
 // Detect runtime TCMalloc bypasses.
 bool IsTcMallocBypassed() {
   // This should detect a TCMalloc bypass from Valgrind.
   char* g_slice = getenv("G_SLICE");
@@ skipping 113 matching lines @@
   // kRandomMask, so we use it as an additional detection mechanism.
   const uintptr_t kRandomMask = 0x3fffffffffffULL;
   bool impossible_random_address =
       reinterpret_cast<uintptr_t>(ptr.get()) & ~kRandomMask;
   EXPECT_FALSE(impossible_random_address);
 }
 
 #endif  // defined(OS_LINUX) && defined(__x86_64__)
 
 }  // namespace