ThreadedTest that a non-null OutputSurface that fails initialization immediately doesn't crash

cc/thread_proxy.cc

Index: cc/thread_proxy.cc
diff --git a/cc/thread_proxy.cc b/cc/thread_proxy.cc
index 68bb89078cebdc692867927743c202bb88f4076b..9f63c3b8a8a7a87fa83e1046e92bd9ed64e9eab0 100644
--- a/cc/thread_proxy.cc
+++ b/cc/thread_proxy.cc
@@ -1013,7 +1013,10 @@ bool ThreadProxy::commitPendingForTesting()
 void ThreadProxy::commitPendingOnImplThreadForTesting(CommitPendingRequest* request)
 {
     DCHECK(isImplThread());
-    request->commitPending = m_schedulerOnImplThread->commitPending();
+    if (m_layerTreeHostImpl->outputSurface())
+        request->commitPending = m_schedulerOnImplThread->commitPending();
+    else
+        request->commitPending = false;
     request->completion.signal();
 }