Web MIDI: add assign() and equals() to WebMIDIPermissionRequest

Source/web/WebFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 1278 matching lines @@
     frame()->document()->markers()->removeMarkers(DocumentMarker::Spelling | DocumentMarker::Grammar);
 }
 
 bool WebFrameImpl::hasSelection() const
 {
     WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame());
     if (pluginContainer)
         return pluginContainer->plugin()->hasSelection();
 
     // frame()->selection()->isNone() never returns true.
-    return (frame()->selection()->start() != frame()->selection()->end());
+    return frame()->selection()->start() != frame()->selection()->end();
 }
 
 WebRange WebFrameImpl::selectionRange() const
 {
     return frame()->selection()->toNormalizedRange();
 }
 
 WebString WebFrameImpl::selectionAsText() const
 {
     WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame());
@@ skipping 1188 matching lines @@
 
         // There is a possibility that the frame being detached was the only
         // pending one. We need to make sure final replies can be sent.
         flushCurrentScopingEffort(m_findRequestIdentifier);
 
         cancelPendingScopingEffort();
     }
 }
 
 } // namespace WebKit