Drop OS::IsOutsideAllocatedSpace() and move the tracking to the MemoryAllocator.

src/platform.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 236 matching lines @@
 
   // Assign memory as a guard page so that access will cause an exception.
   static void Guard(void* address, const size_t size);
 
   // Generate a random address to be used for hinting mmap().
   static void* GetRandomMmapAddr();
 
   // Get the Alignment guaranteed by Allocate().
   static size_t AllocateAlignment();
 
-  // Returns an indication of whether a pointer is in a space that
-  // has been allocated by Allocate().  This method may conservatively
-  // always return false, but giving more accurate information may
-  // improve the robustness of the stack dump code in the presence of
-  // heap corruption.
-  static bool IsOutsideAllocatedSpace(void* pointer);
-
   // Sleep for a number of milliseconds.
   static void Sleep(const int milliseconds);
 
   // Abort the current process.
   static void Abort();
 
   // Debug break.
   static void DebugBreak();
 
   // Dump C++ current stack trace (only functional on Linux).
@@ skipping 334 matching lines @@
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_