tree a821c1a5aa3addce2a3e1f69a37aeb3721ab710e
parent ec599347780d90f9ee0d5d9db08c6aa6cecae91d
author Adrià Vilanova Martínez <me@avm99963.com> 1654002321 +0200
committer Adrià Vilanova Martínez <me@avm99963.com> 1654003835 +0200

Add initial MV3 support

In order to prepare the migration towards Manifest Version 3, this
change adds a MV3 browser target for Chromium (chromium_mv3) and another
one for Edge (edge_mv3), which will build the extension using MV3.

This CL also changes several things to fix some bugs in the MV3 version
of the extension:

- Adds //src/common/actionApi.js to target |chrome.browserAction| (MV2)
  and |chrome.action| (MV3) accordingly using the version-agnostic
  object |actionApi|.
- Adds //src/common/sessionStorage.js to wrap the
  |chrome.storage.session| object in the case of MV3, and polyfill it in
  the case of MV2. (The polyfill isn't perfect, since it stores the data
  under the window object of the current page, so different pages will
  have access to completely different storage areas, which are cleared
  once the page is closed, not once the extension stops running.
  However, this is fine for our case.)

As of now, the extension built with MV3 might have bugs. Thus, the MV3
variant will not be used for builds until it has been stabilized.

Bug: translateselectedtext:4

Change-Id: Ib525339c055237b32b7352c490fee86b21555ed6