Fix crash around candidate window layout.

chromeos/dbus/ibus/ibus_lookup_table.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/dbus/ibus/ibus_lookup_table.h"
 
 #include <string>
 #include "base/logging.h"
 #include "base/values.h"
 #include "chromeos/dbus/ibus/ibus_object.h"
@@ skipping 100 matching lines @@
                << "4th argument should be boolean.";
     return false;
   }
 
   int32 orientation = 0;
   if (!ibus_object_reader.PopInt32(&orientation)) {
     LOG(ERROR) << "Invalid variant structure[IBusLookupTable]: "
                << "5th argument should be int32.";
     return false;
   }
+
+  // Original IBus spec has third orientation IBUS_ORIENTATION_SYSTEM but it
+  // was not supported in Chrome OS. Thus do not cast from integer to enum.
   table->set_orientation(
-      static_cast<IBusLookupTable::Orientation>(orientation));
+      orientation == IBusLookupTable::HORIZONTAL ?
+      IBusLookupTable::HORIZONTAL : IBusLookupTable::VERTICAL);
 
   dbus::MessageReader text_array_reader(NULL);
   if (!ibus_object_reader.PopArray(&text_array_reader)) {
     LOG(ERROR) << "Invalid variant structure[IBusLookupTable]: "
                << "6th argument should be array.";
     return false;
   }
 
   std::vector<IBusLookupTable::Entry>* candidates = table->mutable_candidates();
   while (text_array_reader.HasMoreData()) {
@@ skipping 88 matching lines @@
   candidates_ = table.candidates_;
 }
 
 IBusLookupTable::Entry::Entry() {
 }
 
 IBusLookupTable::Entry::~Entry() {
 }
 
 }  // namespace chromeos