Remove a bunch of NPAPI quirks and related support code

content/browser/frame_host/render_widget_host_view_guest.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 "content/browser/frame_host/render_widget_host_view_guest.h"
 
 #include <utility>
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 497 matching lines @@
 }
 
 void RenderWidgetHostViewGuest::UnlockCompositingSurface() {
   NOTIMPLEMENTED();
 }
 
 #if defined(OS_WIN)
 void RenderWidgetHostViewGuest::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
 }
-
-gfx::NativeViewId RenderWidgetHostViewGuest::GetParentForWindowlessPlugin()
-    const {
-  return NULL;
-}
 #endif
 
 void RenderWidgetHostViewGuest::DestroyGuestView() {
   // Let our observers know we're going away, since we don't want any event
   // processing calls coming in after we release host_.
   NotifyObserversAboutShutdown();
 
   host_->SetView(NULL);
   host_ = NULL;
   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
@@ skipping 92 matching lines @@
     if (gesture_event.type == blink::WebInputEvent::GestureScrollUpdate &&
         gesture_event.data.scrollUpdate.inertial) {
       return;
     }
     host_->ForwardGestureEvent(gesture_event);
     return;
   }
 }
 
 }  // namespace content