Fix WebMStreamParser to handle Cues between Clusters correctly.

media/filters/chunk_demuxer_unittest.cc

Index: media/filters/chunk_demuxer_unittest.cc
diff --git a/media/filters/chunk_demuxer_unittest.cc b/media/filters/chunk_demuxer_unittest.cc
index 74f2a01176fccd1e1e327f7c31699ea370043462..4ca289eff0954b4ca595dc8a2f71f4d6f24c7d01 100644
--- a/media/filters/chunk_demuxer_unittest.cc
+++ b/media/filters/chunk_demuxer_unittest.cc
@@ -46,6 +46,12 @@ const uint8 kVP8Keyframe[] = {
 // WebM Block bytes that represent a VP8 interframe.
 const uint8 kVP8Interframe[] = { 0x11, 0x00, 0x00 };
 
+static const uint8 kCuesHeader[] = {
+  0x1C, 0x53, 0xBB, 0x6B,  // Cues ID
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // cues(size = 0)
+};
+
+
 const int kTracksHeaderSize = sizeof(kTracksHeader);
 const int kTracksSizeOffset = 4;
 
@@ -3480,6 +3486,15 @@ TEST_P(ChunkDemuxerTest, ClusterWithUnknownSize) {
   CheckExpectedRanges(kSourceId, "{ [0,115) }");
 }
 
+TEST_P(ChunkDemuxerTest, CuesBetweenClusters) {
+  ASSERT_TRUE(InitDemuxer(HAS_AUDIO | HAS_VIDEO));
+
+  AppendCluster(GenerateCluster(0, 0, 4));
+  AppendData(kCuesHeader, sizeof(kCuesHeader));
+  AppendCluster(GenerateCluster(46, 66, 5));
+  CheckExpectedRanges(kSourceId, "{ [0,115) }");
+}
+
 // Generate two sets of tests: one using FrameProcessor, and one using
 // LegacyFrameProcessor.
 INSTANTIATE_TEST_CASE_P(NewFrameProcessor, ChunkDemuxerTest, Values(false));