Bug 1037097: restrict image decode size in MediaFrame based on device memory size

add unit tests
Merge pull request #21397 from Rik/update-xulrunner-1034565

Bug 1034565 - CSSLint complains about CSS Variables r=vingtetun
Merge pull request #21578 from empoalp/bug_1029448

Bug 1029448 - Copy improvements when downloading DRM content
Merge pull request #21824 from mcjimenez/bug1039222

Bug 1039222 - [SingleVariant] Removed maximum MMS size customization (r =jmcanterafonseca)
Bug 1040045 - Move code for waiting for the homescreen in gaiatest into its own method. r=dhunt
Merge pull request #21879 from gaye/bump-chai-to-1.9.1

Upgrade chai to 1.9.1 to downstream assert.notInclude
Bug 1036753 - [Calendar] can't delete account
Bug 1036753 - Add end-to-end test for calendar account deletion
Bug 977276 - Hide dialog-overlay when screen is locked.
Merge pull request #21870 from rnowm/1036147-followup

Bug 1040068 - Inconsistency in [contacts] buttons
Merge pull request #21882 from gaye/bug-1036753

Bug 1036753 - Can't delete calendar account r=millermedeiros
Bug 1029721 - CDMA call waiting call is not logged in call history
Merge pull request #21505 from eeejay/bug-977276

Bug 977276 - Hide dialog-overlay when screen is locked. r=timdream
Merge pull request #21511 from KDDI-tech/Bug974864_PR2

Bug 974864: [MMS]Pick recipient(email adress) up from contacts app r=julien,francisco
Revert "Merge pull request #21397 from Rik/update-xulrunner-1034565"

This reverts commit 51ce45b25eaf9cdba330aa11b77eb9dae475e98a, reversing
changes made to d681dcfa20625fb81582fae9e2b2d91ec3eb534b.
Bug 1040342 - Follow up to bug 1039199 with tests
Bug 1028253 - Camera App memory regression in FxOS
Merge pull request #21792 from davidflanagan/bug1037097

Bug 1037097: restrict image decode size in MediaFrame based on device memory size
Merge pull request #21743 from cctuan/1036788

Bug 1036788 - Stop using origins to identify apps
Bug 1039739 - Add some logging when writing the git commit id into the settings app;r=yurenju