Replaced empty handle checks with MaybeHandles

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3149 matching lines @@
 bool v8::Object::SetPrototype(Handle<Value> value) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate, "v8::Object::SetPrototype()", return false);
   ENTER_V8(isolate);
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
   i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
   // We do not allow exceptions thrown while setting the prototype
   // to propagate outside.
   TryCatch try_catch;
   EXCEPTION_PREAMBLE(isolate);
-  i::Handle<i::Object> result = i::JSObject::SetPrototype(self, value_obj);
+  i::MaybeHandle<i::Object> result = i::JSObject::SetPrototype(
+      self, value_obj);
   has_pending_exception = result.is_null();
   EXCEPTION_BAILOUT_CHECK(isolate, false);
   return true;
 }
 
 
 Local<Object> v8::Object::FindInstanceInPrototypeChain(
     v8::Handle<FunctionTemplate> tmpl) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate,
@@ skipping 4432 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal