PartitionAlloc: Distinguish OOMs where a lot of super pages are not committed

Source/wtf/Assertions.h

Index: Source/wtf/Assertions.h
diff --git a/Source/wtf/Assertions.h b/Source/wtf/Assertions.h
index 5e5dd68b47895ba71002cb204e72d211a073d113..d1aaca1b181fe47d759612df19b3972574cc17d4 100644
--- a/Source/wtf/Assertions.h
+++ b/Source/wtf/Assertions.h
@@ -134,6 +134,15 @@ using WTF::FrameToNameScope;
 #endif
 #endif
 
+// IMMEDIATE_CRASH_WITH_FLAG() - Like IMMEDIATE_CRASH() above but try to crash at a specified address to be distinguished in crash reports.
+#ifndef IMMEDIATE_CRASH_WITH_FLAG
+#if COMPILER(GCC)
+#define IMMEDIATE_CRASH_WITH_FLAG(FLAG) IMMEDIATE_CRASH()
+#else
+#define IMMEDIATE_CRASH_WITH_FLAG(FLAG) (((void(*)())((FLAG) & 0xfff))(), IMMEDIATE_CRASH())
+#endif
+#endif
+
 /* CRASH() - Raises a fatal error resulting in program termination and triggering either the debugger or the crash reporter.
 
    Use CRASH() in response to known, unrecoverable errors like out-of-memory.