Add Chromium-side support for SourceBuffer.appendWindowStart and SourceBuffer.appendWindowEnd.

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 559d1abe9c0a762b3eb81f8215ee0d6a1e7330e4..dc568572663a70f68e1b9b779a350a2357da125d 100644
--- a/content/renderer/media/websourcebuffer_impl.cc
+++ b/content/renderer/media/websourcebuffer_impl.cc
@@ -64,6 +64,14 @@ bool WebSourceBufferImpl::setTimestampOffset(double offset) {
   return demuxer_->SetTimestampOffset(id_, time_offset);
 }
 
+void WebSourceBufferImpl::setAppendWindowStart(double start) {
+  demuxer_->SetAppendWindowStart(id_, DoubleToTimeDelta(start));
+}
+
+void WebSourceBufferImpl::setAppendWindowEnd(double end) {
+  demuxer_->SetAppendWindowEnd(id_, DoubleToTimeDelta(end));
+}
+
 void WebSourceBufferImpl::removedFromMediaSource() {
   demuxer_->RemoveId(id_);
   demuxer_ = NULL;