Reland "Add basic crankshaft support for slow-mode for-in to avoid disabling optimizations"

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index c0254875a834e178260b0bd3f9a45089562b2725..25e96f2b63be6a1983571cf62a82871ee150bc67 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -160,7 +160,8 @@ class OptimizedFunctionVisitor BASE_EMBEDDED {
   V(kUnknownMap, "Unknown map")                                                \
   V(kValueMismatch, "value mismatch")                                          \
   V(kWrongInstanceType, "wrong instance type")                                 \
-  V(kWrongMap, "wrong map")
+  V(kWrongMap, "wrong map")                                                    \
+  V(kUndefinedOrNullInForIn, "null or undefined in for-in")
 
 
 class Deoptimizer : public Malloced {