tree 209199f1c052507a71d3894cf5339191da7bd20d
parent eae5819174ef95363b50affbc96c3117ccc458a6
author Brian Anderson <brianderson@google.com> 1469342250 -0700
committer Brian Anderson <brianderson@google.com> 1479243566 -0800

Track frame events incrementally and per layer.

* Replaces FenceTracker, which was owned by SurfaceFlinger,
    with FrameEventHistory, which is owned by Layer.
* Updates FrameEventHistory as events occur.
* Changes SurfaceFlinger flag "--fences" to
    "--frame-events".

Test: adb shell /data/nativetest/libgui_test/libgui_test
--gtest_filter=*GetFrameTimestamps*

Change-Id: I868c2ef93964656d7e41848243433499e7f45fe7