Bug 1317109 - Remove Acrobat plugin quirk handling. r=jimm

Backed out changeset 5cd867e3258b (bug 1317674) for make check failures a=backout

Bug 1311966 - symlink rather than copy artifacts; r?pmoore MozReview-Commit-ID: 5cFjuwtUgEr

Bug 1286799 - Ensure an up-to-date rust toolchain is available. Add a check to `mach bootstrap` that a compatible version of the rust toolchain is installed and in path. Note that we use a separate minimum version from the one checked at configure time, defined in build/moz.configure/rust.configure, because this script may be running stand-alone. If we don't find `rustc` in PATH, we check for it in CARGO_HOME and suggest adding it to PATH. If we don't find `rustc` but find a `rustup`, we call it with the --version switch and report if that fails. This will detect the older `rustup.rs` script. MozReview-Commit-ID: EPfQhLz4Dvo

Bug 1286799 - Use mozboot helper for mercurial version detection. Also use the abstracted helper method for reading the current mercurial version too. This changes the regex from what was in use before, but should work for normal version numbers. MozReview-Commit-ID: IZfC65Jg6T8

Bug 1286799 - Abstract mozboot version checking. Move version parsing to a helper method so it can be used for more than one executable. MozReview-Commit-ID: 4gOgdgYFbFx

Bug 1317478 - Remove obsolete cargo tooltool packages. We no longer make use of these, instead using the cargo included in the rustc packages. MozReview-Commit-ID: Dr9q0g7amEk

Bug 1317478 - Use cargo from the rustc package. The stable cargo now has all the features we need; pulling a separate cargo nightly package is unnecessary. MozReview-Commit-ID: FqWvSK0swsQ

Bug 1113747 - New search UI breaks if too many open search providers are offered. r?florian Based on an earlier patch by Nihanth Subramanya <nhnt11@gmail.com> MozReview-Commit-ID: 4TZzFgovIJm

Bug 1309060 - Run |mach python-test| in parallel from make check, r?gps This duplicates code in client.mk to retrieve the number of cores. We should probably just get the build system to define a global variable for this, but I don't know how to do that. MozReview-Commit-ID: CfAGbVMJXXT

Bug 1309060 - Give |mach python-test| the ability to run tests in parallel, r?gps We recently switched make check to call into |mach python-test| rather than invoking python itself for each test file. But this ended up slowing down the tests as they were no longer being run in parallel. This patch adds a --jobs flag to python-tests and runs test files in parallel. Note: if more than one job is used, output per test will be buffered and printed at the end to avoid interleaving. This has the unfortunate side effect of making |mach python-test| look like it is hanging, especially if running a very long file like mozbase's test.py. For this reason, we still use -j1 by default so output will continue to be streamed. In automation we will use multiple processes though. MozReview-Commit-ID: 3u0wOFmyQLI

Bug 1309060 - Update futures to version 3.0.5, r?gps We need the fix from https://github.com/agronholm/pythonfutures/issues/25 to allow sending KeyboardInterrupts to thread pools. MozReview-Commit-ID: 5VfBttLbKOr

Bug 1309060 - Ignore "No such process" when trying to find pgid in mozprocess, r?gps For some reason calling os.getpgid(proc.pid) in this bug results in an OSError "No such process" on OSX. This bug is starting the ProcessHandler from a concurrent.futures Thread, that must be somehow related. I tried debugging this, but couldn't figure out why this is happening. However, the pgid is not needed for this use case, and simply ignoring the error works. We also ignore this very same exception when calling os.getpgid elsewhere in mozprocess, so there must be some weird OSXism happening. MozReview-Commit-ID: 2YXhBaORC5s

Bug 1315260 - Suspend idle callbacks. r?bkelly MozReview-Commit-ID: HXlkNGIJXuw

Bug 1308061 - Part 1: Update SessionStore.jsm to notify when the list of closed objects changes, r?mikedeboer MozReview-Commit-ID: 7pBrvAhVQHP

Bug 1318004 - Use C++11's override and remove virtual where applicable. MozReview-Commit-ID: H9tAe0YN1tx

Bug 1318004 - Replace string literals containing escaped characters with raw string literals. MozReview-Commit-ID: KOk13e23Py

Bug 1318004 - Replace default bodies of special member functions with = default; MozReview-Commit-ID: 33AOhtFrXS8

Bug 1313864 - Make IdleRequest dispatch itself. r?bkelly Also let the throttled idle callbacks schedule themselves by calling PostThrottledIdleCallback indirectly by using SetTimeoutOrInterval. MozReview-Commit-ID: EuJfpkM6Acf

Bug 1276705 - rm IE/safari settings importers, r=dolske MozReview-Commit-ID: 2YcaxJkbTwj