Distinguish plugin disconnections from plugin crashes.

content/renderer/webplugin_delegate_proxy.cc

Index: content/renderer/webplugin_delegate_proxy.cc
diff --git a/content/renderer/webplugin_delegate_proxy.cc b/content/renderer/webplugin_delegate_proxy.cc
index 09f989b9abade65f015724927c1be9f39fcf6c62..7b590a5dc02ca350a890b66220e37e76f033b60d 100644
--- a/content/renderer/webplugin_delegate_proxy.cc
+++ b/content/renderer/webplugin_delegate_proxy.cc
@@ -316,7 +316,7 @@ bool WebPluginDelegateProxy::Initialize(
       // 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
@@ -499,7 +499,7 @@ void WebPluginDelegateProxy::OnChannelError() {
     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.