Reverting 3174. Aka reapplying 3150, 3151 and 3159. Aka api accessor

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 2596ae0eeeb263d12b89d3741406ad3375ede0ac..a21916072860e73f9bb97611e03778b21c795654 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -4831,6 +4831,12 @@ static Object* Runtime_ReThrow(Arguments args) {
 }
 
 
+static Object* Runtime_PromoteScheduledException(Arguments args) {
+  ASSERT_EQ(0, args.length());
+  return Top::PromoteScheduledException();
+}
+
+
 static Object* Runtime_ThrowReferenceError(Arguments args) {
   HandleScope scope;
   ASSERT(args.length() == 1);
@@ -7792,6 +7798,13 @@ static Object* Runtime_Abort(Arguments args) {
 }
 
 
+static Object* Runtime_DeleteHandleScopeExtensions(Arguments args) {
+  ASSERT(args.length() == 0);
+  HandleScope::DeleteExtensions();
+  return Heap::undefined_value();
+}
+
+
 #ifdef DEBUG
 // ListNatives is ONLY used by the fuzz-natives.js in debug mode
 // Exclude the code in release mode.