Introduce a monotonic_clock module for Mojo.js.

gin/test/file_runner.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 "gin/test/file_runner.h"
 
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "gin/converter.h"
@@ skipping 26 matching lines @@
 
 FileRunnerDelegate::~FileRunnerDelegate() {
 }
 
 void FileRunnerDelegate::UnhandledException(Runner* runner,
                                             TryCatch& try_catch) {
   ModuleRunnerDelegate::UnhandledException(runner, try_catch);
   FAIL() << try_catch.GetStackTrace();
 }
 
-void RunTestFromFile(const base::FilePath& path, FileRunnerDelegate* delegate) {
+void RunTestFromFile(const base::FilePath& path, FileRunnerDelegate* delegate,
+                     bool run_until_idle) {
   ASSERT_TRUE(base::PathExists(path)) << path.LossyDisplayName();
   std::string source;
   ASSERT_TRUE(ReadFileToString(path, &source));
 
   base::MessageLoop message_loop;
 
   gin::IsolateHolder instance;
   gin::Runner runner(delegate, instance.isolate());
   {
     gin::Runner::Scope scope(&runner);
     v8::V8::SetCaptureStackTraceForUncaughtExceptions(true);
     runner.Run(source, path.AsUTF8Unsafe());
 
-    message_loop.RunUntilIdle();
+    if (run_until_idle) {
+      message_loop.RunUntilIdle();
+    } else {
+      message_loop.Run();
+    }
 
     v8::Handle<v8::Value> result = runner.context()->Global()->Get(
         StringToSymbol(runner.isolate(), "result"));
     EXPECT_EQ("PASS", V8ToString(result));
   }
 }
 
 }  // namespace gin