GitLab

Add some more flow trace-events for the various stages during a frame.
For example:
 . [client] Reception of BeginFrame (ReceiveBeginFrame).
 . [client] Generation of RenderPass, DrawQuad etc (GenerateRenderPass).
 . [client] Generation of CompositorFrame (GenerateCompositorFrame).
 . [client] Submission of CompositorFrame (SubmitCompositorFrame).
 . [server] Aggregation of surfaces from various clients in the
            DisplayCompositor (SurfaceAggregation).

An example screenshot: https://imgur.com/a/ZJGfq2J

BUG=855328

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Iccb7b61d485b20256cc8f35a5a4efef4c8ed63ea
Reviewed-on: https://chromium-review.googlesource.com/1116345Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570859}