Revert "cc: Finish frame early if main thread is idle regardless of redraw state"

This reverts commit 430c8fbe.

Reason for revert: various perf regressions.
This should instead be solved via issue 874680.

Original change's description:
> cc: Finish frame early if main thread is idle regardless of redraw state
>
> This condition was added originally in this patch:
> https://codereview.chromium.org/27200003
>
> That patch was trying to trigger early deadlines when the compositor
> thread had work to do but the main thread had aborted.
>
> In a world where we have begin frame acks even when frames aren't
> produced, it's worth triggering early deadlines even when the compositor
> thread doesn't have any work to do either so that the display compositor
> can go ahead and do work earlier.
>
> This is intended as a short-term fix to solve smoothness issues with
> surface for video with 30fps videos.  Ideally the DisplayCompositor will
> have some followups as well so that one client that is slow to respond
> will not cause smoothness issues with another client.
>
> Bug: 874676
> Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I8b6663570aba7d135c1f211a21c37b1e17d19577
> Reviewed-on: https://chromium-review.googlesource.com/1176559
> Commit-Queue: enne <enne@chromium.org>
> Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#583908}

TBR=enne@chromium.org,sunnyps@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 874676, 875255, 875316, 875323, 875328, 875424, 876099
Change-Id: I4fd531fe07396ec2275bfd9109c8d86c6b4778f5
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1191326
Commit-Queue: enne <enne@chromium.org>
Reviewed-by: enne <enne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586402}

cc/scheduler/scheduler_state_machine.cc

@@ -1123,6 +1123,9 @@ bool SchedulerStateMachine::ShouldTriggerBeginImplFrameDeadlineImmediately()
   if (active_tree_needs_first_draw_)
     return true;
 
+  if (!needs_redraw_)
+    return false;
+
   // This is used to prioritize impl-thread draws when the main thread isn't
   // producing anything, e.g., after an aborted commit. We also check that we
   // don't have a pending tree -- otherwise we should give it a chance to