Tweak expectations for VideoRendererImplTest.StartPlayingFrom_LowDelay.

Until we get rid of the internal thread, the buffering events will fire
non-deterministically. For example, under valgrind it's possible for
them to never fire.

BUG=144683

Review URL: https://codereview.chromium.org/403573004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283998 0039d316-1c4b-4281-b951-d872f2087c98

media/filters/video_renderer_impl_unittest.cc

@@ -486,12 +486,12 @@ TEST_F(VideoRendererImplTest, StartPlayingFrom_LowDelay) {
   InitializeWithLowDelay(true);
   QueueFrames("0");
 
-  // Expect to frequently have enough/nothing due to only requiring one frame.
+  // Expect some amount of have enough/nothing due to only requiring one frame.
   EXPECT_CALL(mock_cb_, Display(HasTimestamp(0)));
   EXPECT_CALL(mock_cb_, BufferingStateChange(BUFFERING_HAVE_ENOUGH))
-      .Times(AtLeast(1));
+      .Times(AnyNumber());
   EXPECT_CALL(mock_cb_, BufferingStateChange(BUFFERING_HAVE_NOTHING))
-      .Times(AtLeast(1));
+      .Times(AnyNumber());
   StartPlayingFrom(0);
 
   QueueFrames("10");