Version 5.1.180

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.180@{#1}
Cr-Branched-From: 8872ec5-refs/heads/master@{#34918}

Version 5.1.179

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.179@{#1}
Cr-Branched-From: 27bce81-refs/heads/master@{#34915}

Version 5.1.178

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.178@{#1}
Cr-Branched-From: 1d6dba4-refs/heads/master@{#34914}

Version 5.0.71.21: Merge arm64 CacheLineSizes revert

This reverts:
d627337 - 5.0.71.16 / Fix i/d cache line size confusion typo
c3ff68b - Detect cache line size on Linux for PPC hosts.
Which is the branch's equivalent of backmerging:
5d62db7 - Revert "Detect cache line size on Linux for PPC hosts."

And cherry-picks:
042f09a - Reland PPC portion of "Detect cache line size on Linux for PPC hosts."

BUG=chromium:594646,chromium:593867
LOG=n
R=cbruni@chromium.org

Review URL: https://codereview.chromium.org/1819913002 .

Cr-Commit-Position: refs/branch-heads/5.0@{v8#28}
Cr-Branched-From: ad16e6c-refs/heads/5.0.71@{#1}
Cr-Branched-From: bd9df50-refs/heads/master@{#34215}

Version 5.0.71.20 (cherry-pick)

Merged 1e2d0e1

[regexp] catch stack overflow when parsing back references.

BUG=chromium:595657
LOG=N
R=hablich@chromium.org
TBR=hablich@chromium.org

Review URL: https://codereview.chromium.org/1818883002 .

Cr-Commit-Position: refs/branch-heads/5.0@{v8#27}
Cr-Branched-From: ad16e6c-refs/heads/5.0.71@{#1}
Cr-Branched-From: bd9df50-refs/heads/master@{#34215}

Version 4.9.385.31 (cherry-pick)

Merged 96a2bd8

[builtins] Fix Array.prototype.concat bug

BUG=chromium:594574
LOG=N
R=jkummerow@chromium.org, hablich@chromium.org

Review URL: https://codereview.chromium.org/1820963002 .

Cr-Commit-Position: refs/branch-heads/4.9@{v8#37}
Cr-Branched-From: 2fea296-refs/heads/4.9.385@{#1}
Cr-Branched-From: 0c1430a-refs/heads/master@{#33306}

Version 5.1.177

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.177@{#1}
Cr-Branched-From: cc04776-refs/heads/master@{#34913}

Version 5.1.176

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.176@{#1}
Cr-Branched-From: 04c4bbb-refs/heads/master@{#34912}

Version 5.1.175

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.175@{#1}
Cr-Branched-From: b33076d-refs/heads/master@{#34911}

Version 5.1.174

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.1.174@{#1}
Cr-Branched-From: 0d2e28c-refs/heads/master@{#34906}