Fix various places which do not check if SetProperty threw an exception.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index 795eda073c18e44244093ccc8a88785285d9015a..d625d644c776e744251d69bfc7f582b77751c1b2 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -290,6 +290,17 @@ Handle<Object> SetLocalPropertyIgnoreAttributes(
 }
 
 
+void SetLocalPropertyNoThrow(Handle<JSObject> object,
+                             Handle<String> key,
+                             Handle<Object> value,
+                             PropertyAttributes attributes) {
+  ASSERT(!Top::has_pending_exception());
+  CHECK(!SetLocalPropertyIgnoreAttributes(
+        object, key, value, attributes).is_null());
+  CHECK(!Top::has_pending_exception());
+}
+
+
 Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object,
                                           Handle<String> key,
                                           Handle<Object> value,