Fix one more edge case with WebMediaPlayerDelegate notifications.

Missed this one when testing earlier.

BUG=43667, 367785
TEST=DCHECKs no longer fire.

Review URL: https://codereview.chromium.org/563723006

Cr-Commit-Position: refs/heads/master@{#294517}

media/blink/webmediaplayer_impl.cc

@@ -358,9 +358,9 @@ void WebMediaPlayerImpl::setRate(double rate) {
       rate = kMinRate;
     else if (rate > kMaxRate)
       rate = kMaxRate;
-    if (playback_rate_ == 0 && delegate_)
+    if (playback_rate_ == 0 && !paused_ && delegate_)
       delegate_->DidPlay(this);
-  } else if (playback_rate_ != 0 && delegate_) {
+  } else if (playback_rate_ != 0 && !paused_ && delegate_) {
     delegate_->DidPause(this);
   }