Expose an API to retrieve devtools' WebExtensionInspectedWindowFront which is needed
for webextensions. Exposed a new API on devtools/DevToolsShim
MozReview-Commit-ID: Dyc2UUJGsrs
--HG--
extra : source : b7435cd66ce3299d23f71a9bf855edbcb1ccacf2
Expose an API to retrieve devtools' WebExtensionInspectedWindowFront which is needed
for webextensions. Exposed a new API on devtools/DevToolsShim
MozReview-Commit-ID: Dyc2UUJGsrs
--HG--
extra : rebase_source : 018660cc54bf2454c1f810ded639fd647ba79da3
Also removes some dead code.
A lot of the code in ExtensionUtils.jsm is not needed in all processes, and a
lot of the rest isn't needed until extension code runs. Most of it winds up
being loaded into all processes way earlier than necessary.
MozReview-Commit-ID: CMRjCPOjRF2
--HG--
extra : rebase_source : 37718eaf05a22b8ccb95f633cf7454bd7975cdce