This flag enables feedback allocation heuristics to be based on the
function size. The threshold for feedback allocation is set to
4 * bytecode size to roughly mimic the allocation after 4 invocations.

Change-Id: Ia840cd526e3718d4267e01c688c6c6467e352d72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2685175Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72631}