Delete Node's symbols after Environment has been loaded

Fix #1803.

atom/common/node_bindings.cc

@@ -178,6 +178,9 @@ void NodeBindings::LoadEnvironment(node::Environment* env) {
 
   if (node::use_debug_agent)
     node::EnableDebug(env);
+
+  v8::Local<v8::Value> msg = mate::StringToV8(env->isolate(), "loaded");
+  node::MakeCallback(env->isolate(), env->process_object(), "emit", 1, &msg);
 }
 
 void NodeBindings::PrepareMessageLoop() {

atom/renderer/lib/init.coffee

@@ -88,12 +88,8 @@ if nodeIntegration in ['true', 'all', 'except-iframe', 'manual-enable-iframe']
   window.addEventListener 'unload', ->
     process.emit 'exit'
 else
-  # The Module.runMain will run process._tickCallck() immediately, so we are
-  # able to delete the symbols in this tick even though we used process.nextTick
-  # to schedule it.
-  # It is important that we put this in process.nextTick, if we delete them now
-  # some code in node.js will complain about "process not defined".
-  process.nextTick ->
+  # Delete Node's symbols after the Environment has been loaded.
+  process.once 'loaded', ->
     delete global.process
     delete global.setImmediate
     delete global.clearImmediate