[Mojo] Remove static "bootstrap" state in mojo_js

mojo/apps/js/main.cc

Index: mojo/apps/js/main.cc
diff --git a/mojo/apps/js/main.cc b/mojo/apps/js/main.cc
index 5a6842a3da3a61fbf669e80f59bb322d78ef2f44..12ec34e8af43428b5cf2e556615df4df9ba07ce0 100644
--- a/mojo/apps/js/main.cc
+++ b/mojo/apps/js/main.cc
@@ -4,7 +4,6 @@
 
 #include "base/message_loop/message_loop.h"
 #include "gin/public/isolate_holder.h"
-#include "mojo/apps/js/bootstrap.h"
 #include "mojo/apps/js/mojo_runner_delegate.h"
 #include "mojo/common/bindings_support_impl.h"
 #include "mojo/public/system/core_cpp.h"
@@ -23,18 +22,13 @@
 namespace mojo {
 namespace apps {
 
-void RunMojoJS(MojoHandle pipe) {
-  gin::IsolateHolder instance;
-  Bootstrap::SetInitialHandle(pipe);
+void Start(MojoHandle pipe, const std::string& module) {
+  base::MessageLoop loop;
 
+  gin::IsolateHolder instance;
   MojoRunnerDelegate delegate;
   gin::Runner runner(&delegate, instance.isolate());
-
-  {
-    gin::Runner::Scope scope(&runner);
-    runner.Run("define(['mojo/apps/js/main'], function(main) {});",
-               "mojo.js");
-  }
+  delegate.Start(&runner, pipe, module);
 
   base::MessageLoop::current()->Run();
 }
@@ -43,10 +37,11 @@ void RunMojoJS(MojoHandle pipe) {
 }  // namespace mojo
 
 extern "C" MOJO_APPS_JS_EXPORT MojoResult CDECL MojoMain(MojoHandle pipe) {
-  base::MessageLoop loop;
   mojo::common::BindingsSupportImpl bindings_support;
   mojo::BindingsSupport::Set(&bindings_support);
-  mojo::apps::RunMojoJS(pipe);
+
+  mojo::apps::Start(pipe, "mojo/apps/js/main");
+
   mojo::BindingsSupport::Set(NULL);
   return MOJO_RESULT_OK;
 }