Revert of Add task location information to ExecutionContext

Source/core/workers/WorkerMessagingProxy.cpp

Index: Source/core/workers/WorkerMessagingProxy.cpp
diff --git a/Source/core/workers/WorkerMessagingProxy.cpp b/Source/core/workers/WorkerMessagingProxy.cpp
index 6fa68d0cd6e9f8533ef9f7cc636c69a7856d794a..2a898cadf6a2b32ba4874f3a4ddfec208bdfc575 100644
--- a/Source/core/workers/WorkerMessagingProxy.cpp
+++ b/Source/core/workers/WorkerMessagingProxy.cpp
@@ -166,7 +166,7 @@
 {
     // FIXME: In case of nested workers, this should go directly to the root Document context.
     ASSERT(m_executionContext->isDocument());
-    m_executionContext->postTask(FROM_HERE, task);
+    m_executionContext->postTask(task);
 }
 
 void WorkerMessagingProxy::reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, int exceptionId)
@@ -216,7 +216,7 @@
 void WorkerMessagingProxy::workerObjectDestroyed()
 {
     m_workerObject = nullptr;
-    m_executionContext->postTask(FROM_HERE, createCrossThreadTask(&workerObjectDestroyedInternal, AllowCrossThreadAccess(this)));
+    m_executionContext->postTask(createCrossThreadTask(&workerObjectDestroyedInternal, AllowCrossThreadAccess(this)));
 }
 
 void WorkerMessagingProxy::workerObjectDestroyedInternal(ExecutionContext*, WorkerMessagingProxy* proxy)