Pinch to zoom
Implement pinch to zoom.
Also, I added a marker in the toolbar to show if Servo is redrawing or not.
The label switches from "IDLE" to "LOOP" when Servo is looping (at 60FPS) to redraw the page.
Redrawing is necessary for 3 reasons:
- a CSS animation is ongoing
- scrolling
- zooming
This label is, for now, necessary to make sure we are not looping for not reason.
---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#21303 (github issue number if applicable).
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More gstreamer dependencies
Was running into this issue:
```
error: failed to run custom build command for `gstreamer-player-sys v0.5.0`
process didn't exit successfully: `/home/paul/git/servo/target/debug/build/gstreamer-player-sys-3591c80c70153c3c/build-script-build` (exit code: 1)
--- stderr
`"pkg-config" "--libs" "--cflags" "gstreamer-player-1.0 >= 1.12"` did not exit successfully: exit code: 1
--- stderr
Package gstreamer-player-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gstreamer-player-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gstreamer-player-1.0' found
```
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Add configuration for using ./wpt serve
This allows running `./wpt serve --alias_file ../aliases` to replicate Servo's multiple document root setup when running tests in other browsers.
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Add needed gstreamer packages for Gentoo build
<!-- Please describe your changes on the following line: -->
r? @jdm
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#21418
- [x] These changes do not require tests because: docs
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Null image source check for src, srcset and picture parent
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This PR includes a test which checks for empty src only.
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#21221
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Android: Use info! instead of debug!
Fix#21390
As explained in #21390, we are missing some important logs in release builds, and nightly is not available as a debug build for testers.
For the most important logs, let's use `info` instead of `debug`.
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Sync WPT with upstream (11-08-2018)
⚠️ Do not merge this PR without verifying that it is not overwriting local changes to web-platform-tests. ⚠️
Automated downstream sync of changes from upstream as of 11-08-2018.
[no-wpt-sync]
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