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Page.captureScreenshot blocks on arrival of a LatencyInfo with
BROWSER_SNAPSHOT_FRAME_NUMBER_COMPONENT component. However, the
browse process does not receive latency info when Viz is enabled.
Plumb latency info with BROWSER_SNAPSHOT_FRAME_NUMBER_COMPONENT
component from viz to the browser process.

TBR=boliu@chromium.org

Bug: 810037
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ia81b0644f29a37059a7b3e0303074fb0db340757
Reviewed-on: https://chromium-review.googlesource.com/1020301Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: kylechar <kylechar@chromium.org>
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Commit-Queue: Saman Sami <samans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553271}