Motown: Framework parts for mojo transport (producer/consumer/mediapipe) and control (audiotrack).

services/media/framework/graph.cc

Index: services/media/framework/graph.cc
diff --git a/services/media/framework/graph.cc b/services/media/framework/graph.cc
index 794985d2823bc0fea7e534dd5e2d34070237fa07..a95eb1ed8f2728f08f6cefa6e13e98d6cbdaefe6 100644
--- a/services/media/framework/graph.cc
+++ b/services/media/framework/graph.cc
@@ -199,6 +199,19 @@ void Graph::PrimeSinks() {
   }
 }
 
+void Graph::FlushOutput(const OutputRef& output) {
+  DCHECK(output);
+  engine_.FlushOutput(output);
+}
+
+void Graph::FlushAllOutputs(PartRef part) {
+  DCHECK(part.valid());
+  size_t output_count = part.output_count();
+  for (size_t output_index = 0; output_index < output_count; output_index++) {
+    FlushOutput(part.output(output_index));
+  }
+}
+
 PartRef Graph::Add(Stage* stage) {
   stages_.push_back(stage);