Use fake clock in some more networks tests.

webrtc/base/messagequeue.cc

Index: webrtc/base/messagequeue.cc
diff --git a/webrtc/base/messagequeue.cc b/webrtc/base/messagequeue.cc
index 8dd84cb89c256d4b3fd99ab6ba1240ef3300954e..4a30ad17cc2fec1494a50967762118d26ade4912 100644
--- a/webrtc/base/messagequeue.cc
+++ b/webrtc/base/messagequeue.cc
@@ -146,9 +146,10 @@ void MessageQueueManager::ProcessAllMessageQueuesInternal() {
   {
     DebugNonReentrantCritScope cs(&crit_, &locked_);
     for (MessageQueue* queue : message_queues_) {
-      if (queue->IsQuitting()) {
-        // If the queue is quitting, it's done processing messages so it can
-        // be ignored. If we tried to post a message to it, it would be dropped.
+      if (!queue->IsProcessingMessages()) {
+        // If the queue is not processing messages, it can
+        // be ignored. If we tried to post a message to it, it would be dropped
+        // or ignored.
         continue;
       }
       queue->PostDelayed(RTC_FROM_HERE, 0, nullptr, MQID_DISPOSE,
@@ -251,6 +252,10 @@ bool MessageQueue::IsQuitting() {
   return AtomicOps::AcquireLoad(&stop_) != 0;
 }
 
+bool MessageQueue::IsProcessingMessages() {
+  return !IsQuitting();
+}
+
 void MessageQueue::Restart() {
   AtomicOps::ReleaseStore(&stop_, 0);
 }