[turbofan] Avoid some redundant checks of unordered comparison on arm/arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/793303002

Cr-Commit-Position: refs/heads/master@{#25775}
Introduce unsigned representation types

To make space in the type bitset, remove Function, RegExp, and Buffer
types for now, since they aren't really relied upon anyway.

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/795993002

Cr-Commit-Position: refs/heads/master@{#25776}
[turbofan] update SpillRange to use ZoneVector

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/793323002

Cr-Commit-Position: refs/heads/master@{#25777}
Add a missing DebugPromiseEvent in promise.js

DevTools expects 2 events on Promise.resolve()/Promise.reject():
creation & settlement. The first one was missing.

R=ulan@chromium.org, yangguo@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/792383003

Cr-Commit-Position: refs/heads/master@{#25778}
Update V8 DEPS.

Rolling v8/buildtools/clang_format/script to 81edd558fea5dd7855d67a1dc61db34ae8c1fd63

Rolling v8/buildtools to 05dd6a24723170d7c6ff35b537ee02947f619891

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/797613002

Cr-Commit-Position: refs/heads/master@{#25779}