Enforce ScriptForbiddenScope and make it non-fatal.

Source/core/dom/Microtask.cpp

 /*
  * Copyright (C) 2013 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:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/dom/Microtask.h"
 
 #include "bindings/core/v8/V8PerIsolateData.h"
 #include "bindings/core/v8/V8RecursionScope.h"
+#include "platform/ScriptForbiddenScope.h"
 #include "platform/Task.h"
 #include "public/platform/WebThread.h"
 #include <v8.h>
 
 namespace blink {
 
 void Microtask::performCheckpoint()
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     V8PerIsolateData* isolateData = V8PerIsolateData::from(isolate);
     ASSERT(isolateData);
-    if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint() || isolateData->destructionPending())
+    if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint() || isolateData->destructionPending() || ScriptForbiddenScope::isScriptForbidden())
         return;
     isolateData->setPerformingMicrotaskCheckpoint(true);
     {
         // Ensure that end-of-task-or-microtask actions are performed.
-        V8RecursionScope recursionScope(isolate);
+        OwnPtr<V8RecursionScope> recursionScope = V8RecursionScope::create(isolate);
+        ASSERT(recursionScope);
         isolate->RunMicrotasks();
     }
     isolateData->setPerformingMicrotaskCheckpoint(false);
 }
 
 bool Microtask::performingCheckpoint(v8::Isolate* isolate)
 {
     return V8PerIsolateData::from(isolate)->performingMicrotaskCheckpoint();
 }
 
 static void microtaskFunctionCallback(void* data)
 {
     OwnPtr<WebThread::Task> task = adoptPtr(static_cast<WebThread::Task*>(data));
     task->run();
 }
 
 void Microtask::enqueueMicrotask(PassOwnPtr<WebThread::Task> callback)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     isolate->EnqueueMicrotask(&microtaskFunctionCallback, callback.leakPtr());
 }
 
 void Microtask::enqueueMicrotask(const Closure& callback)
 {
     enqueueMicrotask(adoptPtr(new Task(callback)));
 }
 
 } // namespace blink