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

src/platform.h

Index: src/platform.h
diff --git a/src/platform.h b/src/platform.h
index 18bf6b090ff67c1c16d4c8515e956f607ed093a0..d48196f7d6d0f0b340966adb28b26637ceeeb8d7 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -254,13 +254,6 @@ class OS {
   // 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);