Introduce a microtask suppression scope and move microtask methods to isolate

test/cctest/test-microtask-delivery.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 78 matching lines @@
   CHECK_EQ(4, CompileRun("ordering[3]")->Int32Value());
   CHECK_EQ(5, CompileRun("ordering[4]")->Int32Value());
   CHECK_EQ(6, CompileRun("ordering[5]")->Int32Value());
 }
 
 
 TEST(MicrotaskPerIsolateState) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
   LocalContext context1(isolate.GetIsolate());
-  V8::SetAutorunMicrotasks(isolate.GetIsolate(), false);
+  isolate.GetIsolate()->SetAutorunMicrotasks(false);
   CompileRun(
       "var obj = { calls: 0 };");
   Handle<Value> obj = CompileRun("obj");
   {
     LocalContext context2(isolate.GetIsolate());
     context2->Global()->Set(String::NewFromUtf8(isolate.GetIsolate(), "obj"),
                             obj);
     CompileRun(
         "var resolver = {};"
         "new Promise(function(resolve) {"
@@ skipping 13 matching lines @@
         "var foo = { id: 1 };"
         "Object.observe(foo, function() {"
           "obj.calls++;"
         "});"
         "foo.id++;");
   }
   {
     LocalContext context4(isolate.GetIsolate());
     context4->Global()->Set(String::NewFromUtf8(isolate.GetIsolate(), "obj"),
                             obj);
-    V8::RunMicrotasks(isolate.GetIsolate());
+    isolate.GetIsolate()->RunMicrotasks();
     CHECK_EQ(2, CompileRun("obj.calls")->Int32Value());
   }
 }