Version 5.8.255

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.255@{#1}
Cr-Branched-From: 2fe02ed-refs/heads/master@{#43334}

Version 5.8.254

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.254@{#1}
Cr-Branched-From: f5609a6-refs/heads/master@{#43333}

Version 5.8.253

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.253@{#1}
Cr-Branched-From: 9a407a4-refs/heads/master@{#43331}

Version 5.8.252

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.252@{#1}
Cr-Branched-From: a690aa2-refs/heads/master@{#43324}

Version 5.8.251

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.251@{#1}
Cr-Branched-From: 6746227-refs/heads/master@{#43323}

Version 5.8.250

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.250@{#1}
Cr-Branched-From: 7a91e3c-refs/heads/master@{#43322}

Version 5.8.249

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.249@{#1}
Cr-Branched-From: 2c7f32e-refs/heads/master@{#43319}

Version 5.8.248.1 (cherry-pick)

Merged 2c7f32e
Merged 33766a8
Merged 9a407a4

[heap] Add prefix for young generation handling use counter

Revert "[heap] Add prefix for young generation handling use counter"

Revert "[heap] Add histogram counter for young generation handling"

BUG=chromium:693413,chromium:693413,chromium:693413
LOG=N
[email protected], [email protected]

Review-Url: https://codereview.chromium.org/2708753002 .
Cr-Commit-Position: refs/heads/5.8.248@{v8#2}
Cr-Branched-From: 4629066-refs/heads/master@{#43317}

Version 5.8.248

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.248@{#1}
Cr-Branched-From: 4629066-refs/heads/master@{#43317}

Version 5.8.247

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.8.247@{#1}
Cr-Branched-From: 17ef406-refs/heads/master@{#43316}