We use the same interrupt to both allocate feedback vectors and
for updating the profiler ticks. If there is a feedback vector already
available, we just increment the profiler ticks that we use to mark
for optimizing function. Calling JSFunction::EnsureFeedbackVector
allocates a feedback vector, but doesn't reset the budget, so we
optimize much earlier than expected. This is currently only a problem
with %PrepareFunctionForOptimize that doesn't reset the budget. Other
code paths do also reset the interrupt budget.

Bug: chromium:10243
Change-Id: I611a9202e5e71077bf897def5959bcfe11b8fdf4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2064980
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66426}