Remove BlinkGCInterruptor

third_party/WebKit/Source/platform/heap/GCTaskRunner.h

Index: third_party/WebKit/Source/platform/heap/GCTaskRunner.h
diff --git a/third_party/WebKit/Source/platform/heap/GCTaskRunner.h b/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
index 60f71569e419273fd50fc1f7cf4fb0741e6ae551..5b9d114b25688136ee20288e303dd4b16dff188e 100644
--- a/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
+++ b/third_party/WebKit/Source/platform/heap/GCTaskRunner.h
@@ -41,30 +41,6 @@
 
 namespace blink {
 
-class MessageLoopInterruptor final : public BlinkGCInterruptor {
- public:
-  explicit MessageLoopInterruptor(RefPtr<WebTaskRunner> taskRunner)
-      : m_taskRunner(std::move(taskRunner)) {}
-
-  void requestInterrupt() override {
-    // GCTask has an empty run() method. Its only purpose is to guarantee
-    // that MessageLoop will have a task to process which will result
-    // in GCTaskRunner::didProcessTask being executed.
-    m_taskRunner->postTask(BLINK_FROM_HERE, crossThreadBind(&runGCTask));
-  }
-
- private:
-  static void runGCTask() {
-    // Don't do anything here because we don't know if this is
-    // a nested event loop or not. GCTaskRunner::didProcessTask
-    // will enter correct safepoint for us.
-    // We are not calling onInterrupted() because that always
-    // conservatively enters safepoint with pointers on stack.
-  }
-
-  RefPtr<WebTaskRunner> m_taskRunner;
-};
-
 class GCTaskObserver final : public WebThread::TaskObserver {
   USING_FAST_MALLOC(GCTaskObserver);
 
@@ -103,8 +79,6 @@ class GCTaskRunner final {
       : m_gcTaskObserver(WTF::wrapUnique(new GCTaskObserver)),
         m_thread(thread) {
     m_thread->addTaskObserver(m_gcTaskObserver.get());
-    ThreadState::current()->addInterruptor(WTF::wrapUnique(
-        new MessageLoopInterruptor(thread->getWebTaskRunner())));
   }
 
   ~GCTaskRunner() { m_thread->removeTaskObserver(m_gcTaskObserver.get()); }