Revert of Update V8 to version 4.2.3 (based on...

Revert of Update V8 to version 4.2.3 (based on b62f094884b95cf7b45484a27a9721a8477efc91). (patchset #1 id:1 of https://codereview.chromium.org/807183004/)

Reason for revert:
Breaks win8 gn

Original issue's description:
> Update V8 to version 4.2.3 (based on b62f094884b95cf7b45484a27a9721a8477efc91).
>
> TBR=machenbach@chromium.org
>
> Committed: https://crrev.com/1f4c50ac8b1359e524b5da7e444a667c6b41d19b
> Cr-Commit-Position: refs/heads/master@{#311548}

TBR=v8-autoroll@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/853763002

Cr-Commit-Position: refs/heads/master@{#311552}

DEPS

@@ -47,7 +47,7 @@ vars = {
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   'v8_branch': 'trunk',
-  'v8_revision': 'a2fc6322644e77d39051d926fc018b543ea5dea9',
+  'v8_revision': 'f877f9a63e3b36e2edd3cc5679dc48e3f3776278',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.