Distinguish plugin disconnections from plugin crashes.

webkit/plugins/ppapi/plugin_module.cc

Index: webkit/plugins/ppapi/plugin_module.cc
diff --git a/webkit/plugins/ppapi/plugin_module.cc b/webkit/plugins/ppapi/plugin_module.cc
index b07c6af5eaf3c9dadb36889fbc6dc8ce1e96db94..d19f764260ced825ee448919292d06bb2e7e9976 100644
--- a/webkit/plugins/ppapi/plugin_module.cc
+++ b/webkit/plugins/ppapi/plugin_module.cc
@@ -526,6 +526,12 @@ bool PluginModule::IsProxied() const {
   return !!out_of_process_proxy_;
 }
 
+base::ProcessId PluginModule::GetPeerProcessId() {
+  if (out_of_process_proxy_.get())
+    return out_of_process_proxy_->GetPeerProcessId();
+  return base::kNullProcessId;
+}
+
 // static
 const PPB_Core* PluginModule::GetCore() {
   return &core_interface;