Version 5.7.54

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.54@{#1}
Cr-Branched-From: b481afd-refs/heads/master@{#41253}

Version 5.7.53

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.53@{#1}
Cr-Branched-From: 5e3e29d-refs/heads/master@{#41243}

Version 5.7.52

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.52@{#1}
Cr-Branched-From: cbf59c4-refs/heads/master@{#41236}

Version 5.7.47.1 (cherry-pick)

Merged e461fac
Merged 474bbec
Merged 4f798f9

Revert of [stubs] Fix AccessorInfo mixup in KeyedStoreGeneric (patchset #1 id:1 of https://codereview.chromium.org/2525913002/ )

Revert of [stubs] KeyedStoreGeneric: inline dictionary property stores (patchset v8#2 id:10002 of https://codereview.chromium.org/2524943002/ )

[inspector] revert fallThrough support for async methods

[email protected]

Review URL: https://codereview.chromium.org/2527073002 .

Cr-Commit-Position: refs/heads/5.7.47@{v8#2}
Cr-Branched-From: da72a31-refs/heads/master@{#41224}

Version 5.7.51

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.51@{#1}
Cr-Branched-From: e108f90-refs/heads/master@{#41234}

Version 5.7.50

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.50@{#1}
Cr-Branched-From: 019d446-refs/heads/master@{#41232}

Version 5.7.49

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.49@{#1}
Cr-Branched-From: c162294-refs/heads/master@{#41231}

Version 5.7.48

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.48@{#1}
Cr-Branched-From: 47e30e4-refs/heads/master@{#41225}

Version 5.7.47

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.47@{#1}
Cr-Branched-From: da72a31-refs/heads/master@{#41224}

Version 5.7.46

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/5.7.46@{#1}
Cr-Branched-From: 2661b3e-refs/heads/master@{#41223}