Return a long timeout value from TimeUntilNextProcess when the PacedSender is paused

webrtc/modules/pacing/paced_sender_unittest.cc

Index: webrtc/modules/pacing/paced_sender_unittest.cc
diff --git a/webrtc/modules/pacing/paced_sender_unittest.cc b/webrtc/modules/pacing/paced_sender_unittest.cc
index 6c5e3df2809733d967f5b6124ad3b4802ab4ae81..62359785ae1e764eb98588179fef0fd7fc2e45a9 100644
--- a/webrtc/modules/pacing/paced_sender_unittest.cc
+++ b/webrtc/modules/pacing/paced_sender_unittest.cc
@@ -634,7 +634,9 @@ TEST_F(PacedSenderTest, Pause) {
 
   for (int i = 0; i < 10; ++i) {
     clock_.AdvanceTimeMilliseconds(5);
-    EXPECT_EQ(0, send_bucket_->TimeUntilNextProcess());
+    // TimeUntilNextProcess must not return 0 when paused.  If it does,
+    // we risk running a busy loop, so ideally it should return a large value.
+    EXPECT_GE(send_bucket_->TimeUntilNextProcess(), 1000);
     send_bucket_->Process();
   }