Set real values for various Chromium + Safari CSS @rules

[queengooborg]

This PR is to assist in the efforts of #3710, or more specifically, #4294. I've browsed through WebKit and Blink to identify the exact versions where features were added/removed (if supported at all). Based on the following data, this sets versions within Chrome, Chrome Android, Safari, Safari iOS, Opera, Opera Android, Samsung Internet, and WebView:

css.at-rules.font-face.SVG_fonts

1. Having a hard time finding the exact source code
2. CanIUse lists Safari 3.2
3. Chrome had support, but was removed in Chrome 38: http://www.chromestatus.com/feature/5930075908210688
4. Safari 3.2, Chrome 1-38

css.at-rules.font-face.font-display

1. Safari implemented in WebKit bb5b5cf8885540d1e1370247da6ddd4bdf75ec48, Tue Aug 15 00:03:56 2017 +0000
2. Commit not present in 11.0.3 or earlier, exists in 11.1
3. CanIUse lists Safari 11.1
4. Chrome implemented in https://chromium.googlesource.com/chromium/src/+/5d39943cf7bd8db8aa1f874f3444affca39e408f/third_party/blink/renderer/core/css/font_display.h, initially landed in 72
5. Safari 11.1, Chrome 72

css.at-rules.font-face.unicode-range

1. Implemented in WebKit 648b73b1f8f531ff5a7d7b390e5391abeb7660c3, Mon Jan 7 23:32:55 2008 +0000
2. File WebCore/css/CSSUnicodeRangeValue.cpp defines property, first introduced in WebKit 525.3
3. Safari 3.2, Chrome 1

css.at-rules.import

1. CSSImportRule.cpp created in WebKit 13a64221676d62dba11dd220a03d7dca35609fc3
2. Initial definition in WebCore/css/css_ruleimpl.cpp
3. css_ruleimpl.cpp defined in WebKit bb0c24b55183dc12fee06166f24714471286db70, Fri Aug 24 14:24:40 2001 +0000
4. Commit was before Safari 1.0, defaulting to Safari + Chrome 1

css.at-rules.keyframes (-webkit- prefix)

1. CSSKeyframesRule.cpp created in WebKit a001d32fd3d96bcb4368e91b892622edebbdc333, commit message states the implementation of the property, Tue Aug 5 23:01:41 2008 +0000
2. https://bugs.webkit.org/show_bug.cgi?id=20088
3. File does not exist in Safari 3.2.1 (https://trac.webkit.org/browser/webkit/releases/Apple/Safari%203.2.1/WebCore/css), but exists in Safari 4.0 (https://trac.webkit.org/browser/webkit/releases/Apple/Safari%204.0/WebCore/css/WebKitCSSKeyframesRule.cpp).
4. Safari 4, Chrome 2

css.at-rules.keyframes.ignore_important_declarations

1. Chrome 45 already specified in BCD, Safari is null
2. Safari is true
3. SauceLabs testing: 9.1 + 10 do not ignore !important, 10.1 does
4. Safari 10.1, Chrome 45

css.at-rules.media.-moz-device-pixel-ratio

1. Implied `false` as it's a Firefox-based prefix

css.at-rules.page.size

1. Manually tested in latest browsers (native OS)
2. No Support in Chrome or Safari

Note: all commit hashes are for the WebKit Git mirror.

I have requested @jpmedley’s review on all the Chrome versions, but any and all reviews are welcome!

[ddbeck]

Hi @vinyldarkscratch. Would you update your description to link to the bugs and changes mentioned here? It'll be a lot easier to review this without copying and pasting everything

[queengooborg]

Oh sorry! I forgot GitHub doesn’t automatically generate links inside of HTML tags. Certainly, I’ll update this one, as well as my other similar PR!

[ddbeck]

Just a few issues of note here. Great start on this, @vinyldarkscratch!

[ddbeck]

Looks good. Thank you! 🎉