For HashTable-backed JS objects, use the proper type in the table() accessor

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index d8623f8ce9b5376ba082bd0da79ff3ddcd3a3403..c27b98179bba5ce02bd94ef6343e01da1d280e6e 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -760,7 +760,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetAdd) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
   Handle<Object> key(args[1]);
-  Handle<ObjectHashSet> table(ObjectHashSet::cast(holder->table()));
+  Handle<ObjectHashSet> table(holder->table());
   table = ObjectHashSetAdd(table, key);
   holder->set_table(*table);
   return isolate->heap()->undefined_value();
@@ -772,7 +772,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetHas) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
   Handle<Object> key(args[1]);
-  Handle<ObjectHashSet> table(ObjectHashSet::cast(holder->table()));
+  Handle<ObjectHashSet> table(holder->table());
   return isolate->heap()->ToBoolean(table->Contains(*key));
 }
 
@@ -782,7 +782,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetDelete) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
   Handle<Object> key(args[1]);
-  Handle<ObjectHashSet> table(ObjectHashSet::cast(holder->table()));
+  Handle<ObjectHashSet> table(holder->table());
   table = ObjectHashSetRemove(table, key);
   holder->set_table(*table);
   return isolate->heap()->undefined_value();
@@ -793,7 +793,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetGetSize) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
-  Handle<ObjectHashSet> table(ObjectHashSet::cast(holder->table()));
+  Handle<ObjectHashSet> table(holder->table());
   return Smi::FromInt(table->NumberOfElements());
 }
 
@@ -813,7 +813,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapGet) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  Handle<ObjectHashTable> table(holder->table());
   Handle<Object> lookup(table->Lookup(*key));
   return lookup->IsTheHole() ? isolate->heap()->undefined_value() : *lookup;
 }
@@ -824,7 +824,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapHas) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  Handle<ObjectHashTable> table(holder->table());
   Handle<Object> lookup(table->Lookup(*key));
   return isolate->heap()->ToBoolean(!lookup->IsTheHole());
 }
@@ -835,7 +835,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapDelete) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  Handle<ObjectHashTable> table(holder->table());
   Handle<Object> lookup(table->Lookup(*key));
   Handle<ObjectHashTable> new_table =
       PutIntoObjectHashTable(table, key, isolate->factory()->the_hole_value());
@@ -850,7 +850,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapSet) {
   CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  Handle<ObjectHashTable> table(holder->table());
   Handle<ObjectHashTable> new_table = PutIntoObjectHashTable(table, key, value);
   holder->set_table(*new_table);
   return isolate->heap()->undefined_value();
@@ -861,7 +861,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapGetSize) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  Handle<ObjectHashTable> table(holder->table());
   return Smi::FromInt(table->NumberOfElements());
 }
 
@@ -889,7 +889,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapGet) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
+  Handle<ObjectHashTable> table(weakmap->table());
   Handle<Object> lookup(table->Lookup(*key));
   return lookup->IsTheHole() ? isolate->heap()->undefined_value() : *lookup;
 }
@@ -900,7 +900,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapHas) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
+  Handle<ObjectHashTable> table(weakmap->table());
   Handle<Object> lookup(table->Lookup(*key));
   return isolate->heap()->ToBoolean(!lookup->IsTheHole());
 }
@@ -911,7 +911,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapDelete) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
+  Handle<ObjectHashTable> table(weakmap->table());
   Handle<Object> lookup(table->Lookup(*key));
   Handle<ObjectHashTable> new_table =
       PutIntoObjectHashTable(table, key, isolate->factory()->the_hole_value());
@@ -926,7 +926,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapSet) {
   CONVERT_ARG_HANDLE_CHECKED(JSWeakMap, weakmap, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, key, 1);
   Handle<Object> value(args[2]);
-  Handle<ObjectHashTable> table(ObjectHashTable::cast(weakmap->table()));
+  Handle<ObjectHashTable> table(weakmap->table());
   Handle<ObjectHashTable> new_table = PutIntoObjectHashTable(table, key, value);
   weakmap->set_table(*new_table);
   return isolate->heap()->undefined_value();