Enable round-tripping and updating of WebSourceBufferImpl timestamp offset

media/filters/pipeline_integration_test.cc

Index: media/filters/pipeline_integration_test.cc
diff --git a/media/filters/pipeline_integration_test.cc b/media/filters/pipeline_integration_test.cc
index bdf33f22418b975f4717c31b893ac07f923477b6..edeff8309f128e578e0855007f55c638008b6f22 100644
--- a/media/filters/pipeline_integration_test.cc
+++ b/media/filters/pipeline_integration_test.cc
@@ -293,19 +293,29 @@ class MockMediaSource {
     AppendData(seek_append_size);
   }
 
+  void AppendDataExpectingNoTimestampOffsetUpdate(const uint8* data, int size) {
+    // TODO(wolenetz): Test timestamp offset updating once "sequence" append
+    // mode processing is implemented. See http://crbug.com/249422.
+    base::TimeDelta dummy_new_timestamp_offset;
+    chunk_demuxer_->AppendData(kSourceId, data, size,
+                               &dummy_new_timestamp_offset);
+    EXPECT_EQ(kNoTimestamp(), dummy_new_timestamp_offset);
+  }
+
   void AppendData(int size) {
     DCHECK(chunk_demuxer_);
     DCHECK_LT(current_position_, file_data_->data_size());
     DCHECK_LE(current_position_ + size, file_data_->data_size());
-    chunk_demuxer_->AppendData(
-        kSourceId, file_data_->data() + current_position_, size);
+
+    AppendDataExpectingNoTimestampOffsetUpdate(
+        file_data_->data() + current_position_, size);
     current_position_ += size;
   }
 
   void AppendAtTime(const base::TimeDelta& timestampOffset,
                     const uint8* pData, int size) {
     CHECK(chunk_demuxer_->SetTimestampOffset(kSourceId, timestampOffset));
-    chunk_demuxer_->AppendData(kSourceId, pData, size);
+    AppendDataExpectingNoTimestampOffsetUpdate(pData, size);
     CHECK(chunk_demuxer_->SetTimestampOffset(kSourceId, base::TimeDelta()));
   }