Fix safepoint entering when waiting for a debugger task.

third_party/WebKit/Source/core/workers/WorkerThread.cpp

Index: third_party/WebKit/Source/core/workers/WorkerThread.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerThread.cpp b/third_party/WebKit/Source/core/workers/WorkerThread.cpp
index 89decc0d01f4d8fe1ff0ee6c2336dc5bd4de4440..07ab5b6397ec5381d7b52fe1917fb698bdb20b9a 100644
--- a/third_party/WebKit/Source/core/workers/WorkerThread.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerThread.cpp
@@ -527,7 +527,7 @@ WorkerThread::TaskQueueResult WorkerThread::runDebuggerTask(WaitMode waitMode)
     {
         if (waitMode == DontWaitForTask)
             absoluteTime = 0.0;
-        SafePointScope safePointScope(BlinkGC::NoHeapPointersOnStack);
+        SafePointScope safePointScope(BlinkGC::HeapPointersOnStack);
         task = m_debuggerTaskQueue->waitWithTimeout(result, absoluteTime);
     }