Bug 1554831: For out-of-process iframe documents on Windows, send the a11y emulated window (if any) to the content process. r=eeejay If window emulation is enabled, an out-of-process iframe document should use the same emulated window as its embedder. Previously, we were setting this on DocAccessibleParent, but we weren't sending it to content to make it available on DocAccessibleChild. This meant that accessibles in out-of-process iframe documents were reporting the wrong window handle. Differential Revision: https://phabricator.services.mozilla.com/D32788

Bug 1496386: Apply Meta CSP to System Privileged about:memory. Differential Revision: https://phabricator.services.mozilla.com/D33594

Bug 1484720 - Part 2: Remove always-false isSlowPlatform() test function. r=jya isSlowPlatform() is always false because we no longer support Android 2.3 or B2G. Also remove unused functions isWindows32() and isAndroid(). They were added in bug 1485875, but the callers were later removed in Windows bug 1475564 and Android bug 1368843. Depends on D33423 Differential Revision: https://phabricator.services.mozilla.com/D33424

Bug 1484720 - Part 1: Enable AV1-in-MP4 test on Win32. r=jya AV1-in-MP4 support was disabled on Win32 in bug 1417050 and re-enabled in bug 1475564. This Win32 check should have been removed at that time to re-enable this AV1-in-MP4 test on Win32. Differential Revision: https://phabricator.services.mozilla.com/D33423

Bug 1518730 - Wait for both A and AAAA responses to come back before notifying the listeners r=dragana This way we preserve the behaviour of getaddrinfo, where both A and AAAA responses come back at the same time. Without this Firefox will always be biased, as the first request will usually be resolved first. So if we requested IPv4 first, we'd mostly be using IPv4. If we requested IPv6 first, normally we'll wait for the IPv4 response to come back too, which is functionally equivalent to the new behaviour. However, if the pref is set network.trr.early-AAAA;true then we'd use the IPv6 response immediately, possibly leading to a failed request if the IPv6 connection fails before we have an IPv4 address to fall back to. A test for this patch was added in bug 1542561. Depends on D33476 Differential Revision: https://phabricator.services.mozilla.com/D33477

Bug 1518730 - Only send AAAA TRR requests when the system has IPv6 connectivity r=dragana This is an optimization. If we detect that the system can't use the IPv6 address, there's no point in making a request for it. Depends on D33475 Differential Revision: https://phabricator.services.mozilla.com/D33476

Bug 1518730 - Disable TRR for connectivity checks r=dragana Depends on D33473 Differential Revision: https://phabricator.services.mozilla.com/D33475

Bug 1542561 - Test that a IPv4 NXDOMAIN still uses the IPv6 response, regardless which one comes back first r=dragana This test uses prefs added in Bug 1518730, but the pref is ignored when it doesn't exist, so the test is still valid. Depends on D33471 Differential Revision: https://phabricator.services.mozilla.com/D33473

Bug 1542561 - TRR: Don't return NS_ERROR_UNKNOWN_HOST when a AAAA response comes back first, but the second A response is NXDOMAIN r=dragana Differential Revision: https://phabricator.services.mozilla.com/D33471

Bug 1556386: rename `aSkip` to `aMightSkip` in nsCycleCollectionParticipant.h. r=mccr8 Because it's more accurate. Differential Revision: https://phabricator.services.mozilla.com/D33497

Backed out changeset ba1f75c56457 (bug 1555150) for xpcshell failures at devtools/shared/tests/unit/test_css-properties-db.js

Bug 1122740 - remove useless null checks after allocating memory with |new| r=erahm Differential Revision: https://phabricator.services.mozilla.com/D33445

Bug 1555511 Part 4: Add a test of resizing a document with meta viewport minimum-scale. r=botond Differential Revision: https://phabricator.services.mozilla.com/D33100

Bug 1555511 Part 3: Refactor viewport resize test helper functions. r=botond Differential Revision: https://phabricator.services.mozilla.com/D33362

Bug 1555511 Part 2: Remove a float division in MVM::ScaleZoomWithDisplayWidth. r=botond This is a drive-by fix to turn a division into a multiplication. It also is more correct in that the existing code attempts a divide-by-zero if aNewViewport.width is zero. The updated code will instead return a zoom of zero in such a case. Differential Revision: https://phabricator.services.mozilla.com/D32909

Bug 1555511 Part 1: Make MVM::UpdateResolution clamp viewport zoom for the new display size later in the calculation. r=botond The existing math is attempting to adjust the display scale ratio to prevent the new size from landing outside the min/max zoom bounds. This introduces unwanted side effects that can be avoided by simply clamping to min/max at the end. The remaining math correctly handles the case where the zoom has ALREADY been clamped, which is the only important case. Differential Revision: https://phabricator.services.mozilla.com/D32908

Bug 1556147 - SVGImageElement::BuildPath should never be called r=longsonr SVGImageElement isn't really a SVGGeometryElement, we did that just for better code sharing. BuildPath() won't be called for <image>. Differential Revision: https://phabricator.services.mozilla.com/D33400

Merge mozilla-central to autoland. a=merge CLOSED TREE

Bug 1556391: Fix experiments that never expire r=mythmon Add a test that simulates two Normandy "runs" to verify that the fix actually works. While we are here, fix a bug in the handling of userFacingName/userFacingDescription. Differential Revision: https://phabricator.services.mozilla.com/D33537

Bug 1550911 - Show recommendations on extension and theme lists r=robwu,flod,jaws Differential Revision: https://phabricator.services.mozilla.com/D30745