[Mac] Don't close the Wrench menu after using the zoom buttons if the menu was opened sticky.

chrome/browser/ui_thread_helpers_linux.cc

Index: chrome/browser/ui_thread_helpers_linux.cc
diff --git a/chrome/browser/ui_thread_helpers_linux.cc b/chrome/browser/ui_thread_helpers_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..41721c31753e39423f9026cb36b8273c21950db7
--- /dev/null
+++ b/chrome/browser/ui_thread_helpers_linux.cc
@@ -0,0 +1,18 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui_thread_helpers.h"
+
+#include "base/task.h"
+#include "chrome/browser/chrome_thread.h"
+
+namespace ui_thread_helpers {
+
+bool PostTaskWhileRunningMenu(const tracked_objects::Location& from_here,
+                              Task* task) {
+  // TODO(rsesek): Implementing Linux behavior may fix http://crbug.com/48240
+  return ChromeThread::PostTask(ChromeThread::UI, from_here, task);
+}
+
+}  // namespace ui_thread_helpers