Currently the Gecko Profiler defines a moderate amount of stuff when
MOZ_GECKO_PROFILER is undefined. It also #includes various headers, including
JS ones. This is making it difficult to separate Gecko's media stack for
inclusion in Servo.
This patch greatly simplifies how things are exposed. The starting point is:
- GeckoProfiler.h can be #included unconditionally;
- everything else from the profiler must be guarded by MOZ_GECKO_PROFILER.
In practice this introduces way too many #ifdefs, so the patch loosens it by
adding no-op macros for a number of the most common operations.
The net result is that #ifdefs and macros are used a bit more, but almost
nothing is exposed in non-MOZ_GECKO_PROFILER builds (including
ProfilerMarkerPayload.h and GeckoProfiler.h), and understanding what is exposed
is much simpler than before.
Note also that in BHR, ThreadStackHelper is now entirely absent in
non-MOZ_GECKO_PROFILER builds.
Full Firefox on Linux can now be run with a --headless flag.
This includes seven parts:
1) Running all marionette tests in headless mode.
2) Prevents crashes where Firefox calls into GTK.
3) Adds a headless screen helper which supports changing the headless
screen size with the environment variables MOZ_HEADLESS_WIDTH and
MOZ_HEADLESS_HEIGHT.
4) Supports simulating moving a headless window.
5) Adds a stubbed out nsSound implementation.
6) Supports simulating size mode changes of headless windows.
7) Adds the --headless flag for Firefox.
ScreenHelperGTK is the platform dependent part of the original
nsScreenManagerGtk and nsScreenGtk. It registers monitors-changed
event listener from gtk and pushes updates to ScreenManager. See patch
part 4. for how ScreenManager works.
MozReview-Commit-ID: KBo7ZLFTjM3
The new names make it clearer that these actions apply to just one thread.
- profiler_sleep_start() --> profiler_thread_sleep()
- profiler_sleep_end() --> profiler_thread_wake()
- profiler_is_sleeping() --> profiler_thread_is_sleeping()
- GeckoProfilerSleepRAII --> GeckoProfilerThreadSleepRAII
- GeckoProfilerWakeRAII --> GeckoProfilerThreadWakeRAII
