Handlify GetProperty.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 8d101631df9eddeb4bcdbfd7864087e99f97dee5..647b807a76dc4b4b211bca5380e886e751181e1f 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1953,8 +1953,10 @@ v8::Local<Value> v8::TryCatch::StackTrace() const {
     i::Handle<i::JSObject> obj(i::JSObject::cast(raw_obj), isolate_);
     i::Handle<i::String> name = isolate_->factory()->stack_string();
     if (!i::JSReceiver::HasProperty(obj, name)) return v8::Local<Value>();
-    i::Handle<i::Object> value = i::Object::GetProperty(obj, name);
-    if (value.is_null()) return v8::Local<Value>();
+    i::Handle<i::Object> value;
+    if (!i::Object::GetProperty(obj, name).ToHandle(&value)) {
+      return v8::Local<Value>();
+    }
     return v8::Utils::ToLocal(scope.CloseAndEscape(value));
   } else {
     return v8::Local<Value>();
@@ -2049,8 +2051,8 @@ static i::Handle<i::Object> CallV8HeapFunction(const char* name,
   i::Handle<i::String> fmt_str =
       isolate->factory()->InternalizeUtf8String(name);
   i::Handle<i::Object> object_fun =
-      i::GlobalObject::GetPropertyNoExceptionThrown(
-          isolate->js_builtins_object(), fmt_str);
+      i::Object::GetProperty(
+          isolate->js_builtins_object(), fmt_str).ToHandleChecked();
   i::Handle<i::JSFunction> fun = i::Handle<i::JSFunction>::cast(object_fun);
   i::Handle<i::Object> value = i::Execution::Call(
       isolate, fun, recv, argc, argv, has_pending_exception);
@@ -2185,7 +2187,7 @@ Local<StackFrame> StackTrace::GetFrame(uint32_t index) const {
   EscapableHandleScope scope(reinterpret_cast<Isolate*>(isolate));
   i::Handle<i::JSArray> self = Utils::OpenHandle(this);
   i::Handle<i::Object> obj =
-      i::Object::GetElementNoExceptionThrown(isolate, self, index);
+      i::Object::GetElement(isolate, self, index).ToHandleChecked();
   i::Handle<i::JSObject> jsobj = i::Handle<i::JSObject>::cast(obj);
   return scope.Escape(Utils::StackFrameToLocal(jsobj));
 }
@@ -2500,8 +2502,8 @@ static i::Object* LookupBuiltin(i::Isolate* isolate,
                                 const char* builtin_name) {
   i::Handle<i::String> string =
       isolate->factory()->InternalizeUtf8String(builtin_name);
-  return *i::GlobalObject::GetPropertyNoExceptionThrown(
-      isolate->js_builtins_object(), string);
+  return *i::Object::GetProperty(
+      isolate->js_builtins_object(), string).ToHandleChecked();
 }
 
 
@@ -7001,8 +7003,8 @@ Local<Value> Debug::GetMirror(v8::Handle<v8::Value> obj) {
         isolate_debug->debug_context()->global_object());
     i::Handle<i::String> name = isolate->factory()->InternalizeOneByteString(
         STATIC_ASCII_VECTOR("MakeMirror"));
-    i::Handle<i::Object> fun_obj = i::Object::GetProperty(debug, name);
-    ASSERT(!fun_obj.is_null());
+    i::Handle<i::Object> fun_obj =
+        i::Object::GetProperty(debug, name).ToHandleChecked();
     i::Handle<i::JSFunction> fun = i::Handle<i::JSFunction>::cast(fun_obj);
     v8::Handle<v8::Function> v8_fun = Utils::ToLocal(fun);
     const int kArgc = 1;