Change mojo JS bindings to expose a handle object, which is Closed when garbage

mojo/apps/js/mojo_runner_delegate.cc

 // Copyright 2013 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 "mojo/apps/js/mojo_runner_delegate.h"
 
 #include "base/bind.h"
 #include "base/path_service.h"
 #include "gin/converter.h"
 #include "gin/modules/console.h"
 #include "gin/modules/module_registry.h"
 #include "gin/modules/timer.h"
 #include "gin/try_catch.h"
 #include "mojo/apps/js/bindings/gl/module.h"
 #include "mojo/apps/js/bindings/monotonic_clock.h"
 #include "mojo/apps/js/bindings/threading.h"
 #include "mojo/bindings/js/core.h"
+#include "mojo/bindings/js/handle.h"
 #include "mojo/bindings/js/support.h"
 
 namespace mojo {
 namespace apps {
 
 namespace {
 
 // TODO(abarth): Rather than loading these modules from the file system, we
 // should load them from the network via Mojo IPC.
 std::vector<base::FilePath> GetModuleSearchPaths() {
   std::vector<base::FilePath> search_paths(2);
   PathService::Get(base::DIR_SOURCE_ROOT, &search_paths[0]);
   PathService::Get(base::DIR_EXE, &search_paths[1]);
   search_paths[1] = search_paths[1].AppendASCII("gen");
   return search_paths;
 }
 
 void StartCallback(base::WeakPtr<gin::Runner> runner,
                    MojoHandle pipe,
                    v8::Handle<v8::Value> module) {
   v8::Isolate* isolate = runner->GetContextHolder()->isolate();
   v8::Handle<v8::Function> start;
   CHECK(gin::ConvertFromV8(isolate, module, &start));
 
-  v8::Handle<v8::Value> args[] = { gin::ConvertToV8(isolate, pipe) };
+  v8::Handle<v8::Value> args[] = {
+      gin::ConvertToV8(isolate, mojo::Handle(pipe)) };
   runner->Call(start, runner->global(), 1, args);
 }
 
 }  // namespace
 
 MojoRunnerDelegate::MojoRunnerDelegate()
     : ModuleRunnerDelegate(GetModuleSearchPaths()) {
   AddBuiltinModule(gin::Console::kModuleName, gin::Console::GetModule);
   AddBuiltinModule(gin::TimerModule::kName, gin::TimerModule::GetModule);
   AddBuiltinModule(js::Core::kModuleName, js::Core::GetModule);
@@ skipping 18 matching lines @@
 }
 
 void MojoRunnerDelegate::UnhandledException(gin::ShellRunner* runner,
                                             gin::TryCatch& try_catch) {
   gin::ModuleRunnerDelegate::UnhandledException(runner, try_catch);
   LOG(ERROR) << try_catch.GetStackTrace();
 }
 
 }  // namespace apps
 }  // namespace mojo