Correctly keep track of isolates for microtask execution

Source/web/WebKit.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 58 matching lines @@
 namespace {
 
 class EndOfTaskRunner : public WebThread::TaskObserver {
 public:
     virtual void willProcessTask() override
     {
         AnimationClock::notifyTaskStart();
     }
     virtual void didProcessTask() override
     {
-        Microtask::performCheckpoint();
+        Microtask::performCheckpoint(mainThreadIsolate());
         V8GCController::reportDOMMemoryUsageToV8(mainThreadIsolate());
         V8Initializer::reportRejectedPromisesOnMainThread();
     }
 };
 
 class MainThreadTaskRunner: public WebThread::Task {
     WTF_MAKE_NONCOPYABLE(MainThreadTaskRunner);
 public:
     MainThreadTaskRunner(WTF::MainThreadFunction* function, void* context)
         : m_function(function)
@@ skipping 193 matching lines @@
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     ASSERT(!reloadPages);
     Page::refreshPlugins();
 }
 
 } // namespace blink