Bug 1329554. Part 2 - remove |mMaster->mMinimizePreroll| checks from BufferingState::Step(). r=kikuo

mMinimizePreroll is false in BufferingState because we enter buffering only
after playback starts.

MozReview-Commit-ID: 9vRuogzvV7x

--HG--
extra : rebase_source : f43eb5af15d6ae969a6269c7adf68780d9b3b659
extra : intermediate-source : 0dd36842a3ae6ad9b5421bbd277e9ee05ec2e110
extra : source : eae56fe516563a2675f0492c56c6a01b6f38149f

dom/media/MediaDecoderStateMachine.cpp

@@ -2237,12 +2237,10 @@ BufferingState::Step()
     }
   } else if (mMaster->OutOfDecodedAudio() || mMaster->OutOfDecodedVideo()) {
     mMaster->DispatchDecodeTasksIfNeeded();
-    MOZ_ASSERT(mMaster->mMinimizePreroll ||
-               !mMaster->OutOfDecodedAudio() ||
+    MOZ_ASSERT(!mMaster->OutOfDecodedAudio() ||
                mMaster->IsRequestingAudioData() ||
                mMaster->IsWaitingAudioData());
-    MOZ_ASSERT(mMaster->mMinimizePreroll ||
-               !mMaster->OutOfDecodedVideo() ||
+    MOZ_ASSERT(!mMaster->OutOfDecodedVideo() ||
                mMaster->IsRequestingVideoData() ||
                mMaster->IsWaitingVideoData());
     SLOG("In buffering mode, waiting to be notified: outOfAudio: %d, "