tree 30e1c7e108f1c853e3b938b2ee11482a0c380708
parent 9e0006fa52edf3beabe9c850748f4908e03967f7
author Jaeheon Yi <jaeheon@google.com> 1550131313 -0800
committer Jaeheon Yi <jaeheon@google.com> 1550211651 +0000

[input][trace] Add flow tracing for InputEvent.

This patch adds flow tracing from Scenic to Flutter.

SCN-1178 #comment

TEST=CQ

Change-Id: I387a35f0f9f099c056aa921c5e9a49330ffdc55f