Reimplement Maps and Sets in JS

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index c640a29c10db12c9959479b72d4b8f7afabeb89e..30852adfa9fcc8041dd29677831f8aeb4562f898 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -2494,16 +2494,6 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   __ call(ebx);
   // Result is in eax or edx:eax - do not destroy these registers!
 
-  // Runtime functions should not return 'the hole'.  Allowing it to escape may
-  // lead to crashes in the IC code later.
-  if (FLAG_debug_code) {
-    Label okay;
-    __ cmp(eax, isolate()->factory()->the_hole_value());
-    __ j(not_equal, &okay, Label::kNear);
-    __ int3();
-    __ bind(&okay);
-  }
-
   // Check result for exception sentinel.
   Label exception_returned;
   __ cmp(eax, isolate()->factory()->exception());