Revert of Execute end of scope tasks in isolate's MicrotasksCompletedCallback.

third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
index 0a2cfcb91e350d51b0e373a3f71707588fbdf081..7baff2fe98124552efbb5b6bb6ed8c9a2e6a1af7 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp
@@ -48,11 +48,6 @@
     RELEASE_ASSERT(!ScriptForbiddenScope::isScriptForbidden());
 }
 
-static void microtasksCompletedCallback(v8::Isolate* isolate)
-{
-    V8PerIsolateData::from(isolate)->runEndOfScopeTasks();
-}
-
 #if ENABLE(ASSERT)
 static void assertV8RecursionScope(v8::Isolate* isolate)
 {
@@ -163,7 +158,6 @@
         isolate()->AddCallCompletedCallback(&assertV8RecursionScope);
 #endif
     isolate()->AddBeforeCallEnteredCallback(&beforeCallEnteredCallback);
-    isolate()->AddMicrotasksCompletedCallback(&microtasksCompletedCallback);
     if (isMainThread())
         mainThreadPerIsolateData = this;
     isolate()->SetUseCounterCallback(&useCounterCallback);
@@ -224,7 +218,6 @@
         isolate->RemoveCallCompletedCallback(&assertV8RecursionScope);
 #endif
     isolate->RemoveBeforeCallEnteredCallback(&beforeCallEnteredCallback);
-    isolate->RemoveMicrotasksCompletedCallback(&microtasksCompletedCallback);
     V8PerIsolateData* data = from(isolate);
 
     // Clear everything before exiting the Isolate.