* Remove time
* Remove rand
* Remove array buffers
* Remove more code
* Remove more image decoding code
* Remove more code
* Remove old public API
* Remove more old public headers
* Remove layout test support
* Remove WebPrivateOwnPtr
* Remove WebString
* Remove worker pool
This patch:
- makes dart traces (coming from the VM and the timeline API)
available to mojo:tracing
- adds --vm-complete-timeline parameter, which makes the Dart VM enable all
categories of timeline traces from the beginning, allowing to do startup
tracing
This is based on the equivalent support in dart content handler.
Fixes https://github.com/flutter/flutter/issues/3162.
This include build system changes for selecting Dart's precompiler mode
plus a way to locate and load the precompiled snapshot library from an
Android application
Dart invokes Start/StopTracing callbacks within the _setVMTimelineFlags service
method whenever the embedder timeline stream toggles on or off. Flutter's
implementation of these callbacks was modifying the set of enabled streams,
which could override the intended behavior of _setVMTimelineFlags.
Start/StopTracing will now only control Flutter's embedder-specific log.
Also needed to change the Flutter engine's --trace-startup flag to set the
corresponding timeline stream flag on the Dart VM.
Now that we understand window insets, we don't need to hard-code the size of
the status bar. Also, convert the viewport metrics to be consistently in
physical pixels.
This complex machinery made sense for Blink, which has hundreds of
developers. In our case, we're just moving around two bools. We can do
that in a much simpler way.
I left this code along in my uber patch to remove the DOM and CSS, but it's
just as dead. Also, move lone files out of dead directories into more sensible
places.
Currently we run some tasks on the UI thread that shouldn't block the frame,
such as decoding images. This patch introduces a background thread on which we
can run these tasks.
