Do not hide the cursor on a key up

ash/wm/cursor_manager_chromeos.cc

 // Copyright 2014 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 "ash/wm/cursor_manager_chromeos.h"
 
 #include "base/logging.h"
 #include "ui/keyboard/keyboard_util.h"
 #include "ui/wm/core/cursor_manager.h"
 #include "ui/wm/core/native_cursor_manager.h"
 
 namespace ash {
 
 CursorManager::CursorManager(
     scoped_ptr< ::wm::NativeCursorManager> delegate)
         : ::wm::CursorManager(delegate.Pass()) {
 }
 
 CursorManager::~CursorManager() {
 }
 
 bool CursorManager::ShouldHideCursorOnKeyEvent(
     const ui::KeyEvent& event) const {
+  if (event.type() != ui::ET_KEY_PRESSED)
+    return false;
+
   // Clicking on a key when the accessibility virtual keyboard is enabled should
   // not hide the cursor.
   if (keyboard::GetAccessibilityKeyboardEnabled())
     return false;
   // All alt and control key commands are ignored.
   if (event.IsAltDown() || event.IsControlDown())
     return false;
 
   ui::KeyboardCode code = event.key_code();
   if (code >= ui::VKEY_F1 && code <= ui::VKEY_F24)
@@ skipping 12 matching lines @@
     case ui::VKEY_BRIGHTNESS_DOWN:
     case ui::VKEY_BRIGHTNESS_UP:
     case ui::VKEY_KBD_BRIGHTNESS_UP:
     case ui::VKEY_KBD_BRIGHTNESS_DOWN:
       return false;
     default:
       return true;
   }
 }
 }  // namespace ash