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presentation feedback.

This CL adds support for reporting egl_composite_interval and
presentation_time via the presentation feedabck.
GLSurfacePresentationHelper uses the new interface
EGLTImestampClient to query the egl timestamp info.

Bug: 790761
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I7e1f3200bba41bf3252b8acedc68393eeeb76df5
Reviewed-on: https://chromium-review.googlesource.com/1106600
Commit-Queue: vikas soni <vikassoni@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583360}