Distinguish plugin disconnections from plugin crashes.

content/renderer/webplugin_delegate_proxy.cc

 // Copyright (c) 2012 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/renderer/webplugin_delegate_proxy.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #elif defined(USE_X11)
 #include <cairo/cairo.h>
@@ skipping 298 matching lines @@
             render_view_->routing_id(), url, page_url_, mime_type_,
             &channel_handle, &info_))) {
       continue;
     }
 
     if (channel_handle.name.empty()) {
       // We got an invalid handle.  Either the plugin couldn't be found (which
       // shouldn't happen, since if we got here the plugin should exist) or the
       // plugin crashed on initialization.
       if (!info_.path.empty()) {
-        render_view_->PluginCrashed(info_.path);
+        render_view_->PluginCrashed(info_.path, base::kNullProcessId);
         LOG(ERROR) << "Plug-in crashed on start";
 
         // Return true so that the plugin widget is created and we can paint the
         // crashed plugin there.
         return true;
       }
       LOG(ERROR) << "Plug-in couldn't be found";
       return false;
     }
 
@@ skipping 162 matching lines @@
 void WebPluginDelegateProxy::OnChannelError() {
   if (plugin_) {
     if (window_) {
       // The actual WebPluginDelegate never got a chance to tell the WebPlugin
       // its window was going away. Do it on its behalf.
       WillDestroyWindow();
     }
     plugin_->Invalidate();
   }
   if (!channel_host_->expecting_shutdown())
-    render_view_->PluginCrashed(info_.path);
+    render_view_->PluginCrashed(info_.path, channel_host_->peer_pid());
 
 #if defined(OS_MACOSX) || defined(OS_WIN)
   // Ensure that the renderer doesn't think the plugin still has focus.
   if (render_view_)
     render_view_->PluginFocusChanged(false, instance_id_);
 #endif
 }
 
 static void CopyTransportDIBHandleForMessage(
     const TransportDIB::Handle& handle_in,
@@ skipping 786 matching lines @@
 
 void WebPluginDelegateProxy::OnURLRedirectResponse(bool allow,
                                                    int resource_id) {
   if (!plugin_)
     return;
 
   plugin_->URLRedirectResponse(allow, resource_id);
 }
 
 }  // namespace content