Included hash in wasm file.
Added a manifest file that contains the wasm file name for worker access.
Reworked worker setup to query the manifest file without caching, ensuring the correct wasm file name is always retrieved.
The worker will first attempt to retrieve the cached wasm file, but will refetch it with a cache reload if an error occurs.
Change-Id: Ic4ef68e502b318a29243bf275c041863ec1275ee
This reverts commit 9022506292.
Reason for revert: Execute permissions are not required for this file. The error "Uncaught DOMException: Failed to execute 'importScripts' on 'WorkerGlobalScope':" was instead caused by a browser cached version of import returning an incorrect response.
Change-Id: Ib5f6bf30dc5a9919bb7d71fb2b04075486c74f89
Execute permissions are needed on the wasm_exec.js file but nothing seems to set this by default. Once set, it will keep permissions even after rebuilds, but this change will set the initial permissions if required for any new environments.
Change-Id: Ic6848e561210231e67dd2e17a286abdf885926ed
