[crankshaft][runtime] Initialize uninitialized double fields with hole NaN value instead of 0.0.

src/crankshaft/hydrogen.h

Index: src/crankshaft/hydrogen.h
diff --git a/src/crankshaft/hydrogen.h b/src/crankshaft/hydrogen.h
index 8d32dc6589014c7d8b8e8c90f3a378ad7e6aa994..60b5212ed2e2df85600a367b2f17dbc735ebf7c2 100644
--- a/src/crankshaft/hydrogen.h
+++ b/src/crankshaft/hydrogen.h
@@ -2456,7 +2456,13 @@ class HOptimizedGraphBuilder : public HGraphBuilder,
           field_type_(HType::Tagged()),
           access_(HObjectAccess::ForMap()),
           lookup_type_(NOT_FOUND),
-          details_(PropertyDetails::Empty()) {}
+          details_(PropertyDetails::Empty()),
+          store_mode_(STORE_TO_INITIALIZED_ENTRY) {}
+
+    // Ensure the full store is performed.
+    void MarkAsInitializingStore();
+
+    StoreFieldOrKeyedMode StoreMode();
 
     // Checkes whether this PropertyAccessInfo can be handled as a monomorphic
     // load named. It additionally fills in the fields necessary to generate the
@@ -2618,6 +2624,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder,
     Handle<Map> transition_;
     int number_;
     PropertyDetails details_;
+    StoreFieldOrKeyedMode store_mode_;
   };
 
   HValue* BuildMonomorphicAccess(PropertyAccessInfo* info, HValue* object,