Fix possible buffer emission during an abort.

content/renderer/media/websourcebuffer_impl.cc

Index: content/renderer/media/websourcebuffer_impl.cc
diff --git a/content/renderer/media/websourcebuffer_impl.cc b/content/renderer/media/websourcebuffer_impl.cc
index ff3ac5b0079eaad191862c5bce60da8687bba712..93a996b6ece593937e15f1f744cffd886b865ca4 100644
--- a/content/renderer/media/websourcebuffer_impl.cc
+++ b/content/renderer/media/websourcebuffer_impl.cc
@@ -88,7 +88,13 @@ void WebSourceBufferImpl::append(
 }
 
 void WebSourceBufferImpl::abort() {
-  demuxer_->Abort(id_);
+  demuxer_->Abort(id_,
+                  append_window_start_, append_window_end_,
+                  &timestamp_offset_);
+
+  // TODO(wolenetz): abort should be able to modify the caller timestamp offset
+  // (just like WebSourceBufferImpl::append).
+  // See http://crbug.com/370229 for further details.
 }
 
 void WebSourceBufferImpl::remove(double start, double end) {