GitLab

This reverts commit b0985684.

Reason for revert: Speculative revert. Suspect this is causing renderer crashes for

webaudio/AudioBuffer/huge-buffer.html
webaudio/dom-exceptions.html

https://ci.chromium.org/p/chromium/builders/ci/WebKit%20Win10/58083

Original change's description:
> [arraybuffer] Switch backing store from DataHandle to v8::BackingStore
> 
> With this CL we finally use v8::BackingStore as the backing store
> implementation of blink::ArrayBuffer.
> 
> Changes:
> * Use v8::BackingStore as the backing store for ArrayBufferContents.
> * Remove ArraybufferContents::DataHolder and
>   ArrayBufferContents::DataHandle.
> * Replace all uses of DataHolder in ArraybufferContents with uses of
>   v8::BackingStore.
> * Replace the use of DataHandle in the V8 bindings.
> * Add an exception to the presubmit check to allow std::shared_ptr in
>   ArrayBufferContents. It is contained there and does not escape.
> 
> R=​haraken@chromium.org, ulan@chromium.org
> 
> Bug: chromium:1008840
> Change-Id: Iffa31e889daf4ae54de96f55b4612833d096a884
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1886858
> Commit-Queue: Andreas Haas <ahaas@chromium.org>
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Reviewed-by: Kentaro Hara <haraken@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#712571}

TBR=ulan@chromium.org,haraken@chromium.org,agrieve@chromium.org,ahaas@chromium.org

Change-Id: I88668a9d2d582ef38ccb82f1c87139da4c74db62
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:1008840
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899413Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712620}