[Vertical Writing Mode] Rename "vertical-right" CSS value to match spec

[Vertical Writing Mode] Rename "vertical-right" CSS value to match spec
https://bugs.webkit.org/show_bug.cgi?id=150766

Reviewed by Darin Adler.

Source/WebCore:

The spec has changed the initial value of text-orientation from "vertical-right"
to "mixed." This patch follows this movement, but also keeps the existing
property working (the parser will treat both values the same).

Test: fast/text/vertical-mixed.html

* css/CSSParser.cpp:
(WebCore::CSSParser::parseValue):
* css/CSSPrimitiveValueMappings.h:
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue):
(WebCore::CSSPrimitiveValue::operator TextOrientation):
* css/CSSValueKeywords.in:
* css/StyleResolver.cpp:
(WebCore::checkForOrientationChange):
* platform/graphics/FontCascadeFonts.cpp:
(WebCore::glyphDataForNonCJKCharacterWithGlyphOrientation):
* platform/graphics/FontDescription.cpp:
(WebCore::FontDescription::FontDescription):
* platform/graphics/cocoa/FontCascadeCocoa.mm:
(WebCore::FontCascade::fontForCombiningCharacterSequence):
* platform/text/TextFlags.h:
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::getFontAndGlyphOrientation):
* rendering/style/RenderStyle.h:
* rendering/style/RenderStyleConstants.h:
* rendering/style/StyleRareInheritedData.cpp:
(WebCore::StyleRareInheritedData::StyleRareInheritedData):
* style/StyleResolveForDocument.cpp:
(WebCore::Style::resolveForDocument):

LayoutTests:

* fast/css/getComputedStyle/computed-style-expected.txt:
* fast/css/getComputedStyle/computed-style-without-renderer-expected.txt:
* fast/css/inherited-properties-rare-text-expected.txt:
* fast/text/vertical-mixed-expected.html: Added.
* fast/text/vertical-mixed.html: Added.
* svg/css/getComputedStyle-basic-expected.txt:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@191935 268f45cc-cd09-0410-ab3c-d52691b4dbfc