Ignore inserting character with Search as a modifier on ChromeOS

ui/events/base_event_utils.cc

 // Copyright 2015 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 "ui/events/base_event_utils.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/logging.h"
+#include "ui/events/event_constants.h"
 
 namespace ui {
 
+namespace {
+
+#if defined(OS_CHROMEOS)
+const int kSystemKeyModifierMask = EF_ALT_DOWN | EF_COMMAND_DOWN;
+#else
+const int kSystemKeyModifierMask = EF_ALT_DOWN;
+#endif  // defined(OS_CHROMEOS)
+
+
+}  // namespace
+
 base::StaticAtomicSequenceNumber g_next_event_id;
 
 uint32 GetNextTouchEventId() {
   // Set the first touch event ID to 1 because we set id to 0 for other types
   // of events.
   uint32 id = g_next_event_id.GetNext();
   if (id == 0)
     id = g_next_event_id.GetNext();
   DCHECK_NE(0U, id);
   return id;
 }
 
+bool IsSystemKeyModifier(int flags) {
+  return (kSystemKeyModifierMask & flags) != 0;
+}
+
 }  // namespace ui