Bug 1249210 - Install files using multiple threads on Windows; r?glandium As previous measurements have shown, creating/appending files on Windows/NTFS is slow because the CloseHandle() Win32 API takes 1-3ms to complete. This is apparently due to a fundamental issue with NTFS extents. A way to work around this slowness is to use multiple threads for I/O so file closing doesn't block execution as much. This commit updates the file copier to use a thread pool of 4 threads when processing file copies. Additional threads appear to have diminishing returns. On my i7-6700K, this reduces the time for processing the tests install manifest (24,572 files) on Windows from ~22.0s to ~12.5s in the best case. Using the thread pool globally resulted in a performance regression on Linux. Given the performance sensitivity of manifest copying, I thought it best to implement a slightly redundant non-Windows branch to preserve performance. For the record, that same machine running Linux is capable of processing nearly the same install manifest (24,616 files) in ~2.2s in the best case. MozReview-Commit-ID: B9LbKaOoO1u

Bug 1232357 - Delay hiding the sound indicator icon by a few seconds after audio has stopped. r?hiro MozReview-Commit-ID: CU79YSMmGs1

Bug 1248909: [MSE] P2. Simplify diagnostic. r?gerald Also, an assert could have been incorrectly triggered should eviction occurred on another source buffer while data was being appended on another. MozReview-Commit-ID: 6gVHZdbL07B

Bug 1248483: Resync FFvpx to n3.0-1-g0aa2fbd. r=kentuckyfriedtakahe MozReview-Commit-ID: JPOz0SldaSv

Bug 1248909: [MSE] Use MOZ_DIAGNOSTIC_ASSERT. r=gerald MozReview-Commit-ID: 5HPdLKopGGa

Bug 1248681 - Warn if the result of putWrapper goes unused; r=sfink

Bug 1243216 - Make clickable slides more visible. r=Margaret MozReview-Commit-ID: ECC9BgVI5AC

Bug 1248916 - Ignore mozdebug.requiresEscapedArgs in mochitest, r=ted.mielczarek Mochitest no longer passes in debug_args in via the commandline. Instead, it passes them in via a marionette chrome script, meaning they no longer need to be escaped. Since web-platform-tests still passes debug_args on the commandline, we can't simply remove the feature entirely. Instead, just make mochitest ignore requiresEscapedArgs. MozReview-Commit-ID: KBVviGpkvQS

Bug 1248521 - Pack PrefHashEntry better. r=froydnj. This reduces sizeof(PrefHashEntry) from 40 bytes to 32 bytes on 64-bit platforms, which reduces the entry storage of |gHashTable| from 160 KiB to 128 KiB in every process.

Bug 1248551 - Add assertion to confirm that the bidi code is not trying to execute an invalid state-machine action. r=roc

Bug 1246220: Update test_bug337744 (r=mcmanus)

Bug 1246220 - Remove SEC_NORMAL from netwerk/test (r=ckerschb,mcmanus)

Backout 2c97c2a5dad7 bug 1249033. r=me

Bug 1249033 - Enable Subpixel AA Text on Skia for Dwrite and GDI Fonts. r=jrmuizel

Bug 1249078 - Support grouping and running tasks by tag; r=garndt We can now define a list of "tags" for a task. Specifying "-j <tag>" in Try syntax will run all tasks having that tag. MozReview-Commit-ID: Ih9Z0tRZ5VA

Bug 1248461 - Enable rust for win32 official builds. r=mshal This uses a repacked version of the upstream 1.8 nightly builds. We need 1.8 for WinXP support, but it's safe to use nightly until this stablises because other platforms are using stable rust and will catch any nightly-only feature use. For these builds I used the channel-rustc-nightly manifest instead of the older channel-rust-* manifest, to get the separate std packages. tar xf rustc-nightly-i686-pc-windows-msvc.tar.gz rustc-nightly-i686-pc-windows-msvc/install.sh --prefix=rustc/ tar xf rust-std-nightly-i686-pc-windows-msvc.tar.gz rust-std-nightly-i686-pc-windows-msvc/install.sh --prefix=rustc/ tar cjf rustc.tar.bz2 rustc/*

Bug 1241087: SharedStubs: Enable shared stubs by default for ion, r=jandem

Bug 1242578: IonMonkey - Mark as succesfull when taking a binary arith optimization path, r=shu

Bug 1243337: Indicate the correct context for the generate-id function. r=peterv

Bug 1093012 - Set plugins-path for mozmill tests run via mozharness. r=jlund