Moved the following IPC messages used by the chrome NPAPI plugin installer out of content

webkit/plugins/npapi/webplugin_delegate_impl_win.cc

 // Copyright (c) 2011 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 "webkit/plugins/npapi/webplugin_delegate_impl.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 514 matching lines @@
 
 void WebPluginDelegateImpl::Paint(WebKit::WebCanvas* canvas,
                                   const gfx::Rect& rect) {
   if (windowless_) {
     skia::ScopedPlatformPaint scoped_platform_paint(canvas);
     HDC hdc = scoped_platform_paint.GetPlatformSurface();
     WindowlessPaint(hdc, rect);
   }
 }
 
-void WebPluginDelegateImpl::InstallMissingPlugin() {
-  NPEvent evt;
-  evt.event = default_plugin::kInstallMissingPluginMessage;
-  evt.lParam = 0;
-  evt.wParam = 0;
-  instance()->NPP_HandleEvent(&evt);
-}
-
 bool WebPluginDelegateImpl::WindowedCreatePlugin() {
   DCHECK(!windowed_handle_);
 
   RegisterNativeWindowClass();
 
   // UIPI requires reparenting in the (medium-integrity) browser process.
   bool reparent_in_browser = (quirks_ & PLUGIN_QUIRK_REPARENT_IN_BROWSER) != 0;
 
   // The window will be sized and shown later.
   windowed_handle_ = CreateWindowEx(
@@ skipping 970 matching lines @@
       ::ReleaseCapture();
       break;
 
     default:
       break;
   }
 }
 
 }  // namespace npapi
 }  // namespace webkit