WebEngine workshop patches

f86cfe8202c Declare a Qt IPC message class

squash: daf98e6cbce <chromium> BrowserAccessibilityManager::Create is implemented in Qt sources. 54c2ac93fe4 Remove the Running without SUID sandbox error message 15effe90f54 Use target sysroot only with target toolchain 12aff07d7be Do not force the use of Google's custom clang binaries 404029dfe83 Do not directly override libc symbols from the library. bd50a066e2a Remove reference to safe_browsing constants 26b797c757b Fix Renderer and GPU threads on windows 445060bb2e9 Fix race condition on gpu thread initialization 484729568cc Fix --single-process --disable-gpu combination not to hit asserts 60e0793e245 Fix QRC cookies for tests with network-service

404029dfe83 Do not directly override libc symbols from the library. e5b29bc096c Fix recursive deadlock in sandbox::InitLibcLocaltimeFunctions

upstream: 15c2004e2e9 Suppress error message on unneeded V8 external startup files f785a68cedf Fix incorrect dependency on shim headers 2621e3c2875 Allow shims in official builds e976a178ab2 Support linux-clang-libc++ builds 862f78190ea Unbundle Linux system libraries for GN be4cd754e6f Optionally link with system ffmpeg 97c9f8d0b71 Optionally link with system ICU eeccfe807ae Improve jpeg headers handling e936e9c5211 Fix headers for libpng in skia 4cfda813c3a Allow Service Workers without HTTP headers (again) dd722c7c9f1 Do not build swiftshader when it is disabled d9df77e2f1a Fix hanging of process when application is closed too fast d3d28254cc3 Pass original_request_url correctly (for view-source tests) ccd54fe5f0e Enable high resolution printing 222f3bf5b26 Legalize the bloody code e96095db5e7 Reintroduce SANDBOX_EXPORTS, and fix it for heterogeneous executables 6dc94729f2a Fix zygote path used 81e74140320 Fix changing should_override_user_agent_in_new_tabs_ eea17e6a064 Do not override ios settings

check if meaningful or fixed: 107cbd2ebaa Fix webfonts with wrong hinting on Linux 180246344e5 Fix override of malloc 26b797c757b Fix Renderer and GPU threads on windows 73030c7da5b Invalidate cached selection bounds on scrolling 8d2d8548437 Enable NativeThemeAura on macOS too 75d0dad64c8 Make text selection handles available on macOS too 8eced4eb145 [Revert] Hook up new rc.py. 5e883407074 Disable responsiveness watcher 1681802beb6 Fix CDM on OSX and Windows with component installer 039557e5aa9 Enable the option to remove previous user PrefService

split: bec44cc7101 Qt GN integration 0dc3904c28d Fix printing sources for Qt and add them to the build. (display change, update toolkit_qt) Consider constexpr fixes patch 4366322b162 Use ui::Compositor (3rdparty) (remove what isnt needed)

regroup 1209cf45261 Optionally unbundle libvpx, opus, FLAC, re2 and OpenH264 862f78190ea Unbundle Linux system libraries for GN eeccfe807ae Improve jpeg headers handling

fix bd503db5998 Fix Chrome resources and WebUI we need

rename 3ba38cdff2a Fix building without WebSpeech (and squash with soda patch)