Implement "word-break: keep-all" in CSS3 Text

Source/core/css/parser/CSSParserFastPaths.cpp

Index: Source/core/css/parser/CSSParserFastPaths.cpp
diff --git a/Source/core/css/parser/CSSParserFastPaths.cpp b/Source/core/css/parser/CSSParserFastPaths.cpp
index f9d9c765d82905cf71688863fa7bd033ebfa347d..424c92525f5aa3232a644f61a9a398f81cee9c3b 100644
--- a/Source/core/css/parser/CSSParserFastPaths.cpp
+++ b/Source/core/css/parser/CSSParserFastPaths.cpp
@@ -357,8 +357,8 @@ bool CSSParserFastPaths::isValidKeywordPropertyAndValue(CSSPropertyID propertyId
         return valueID >= CSSValueHorizontalTb && valueID <= CSSValueHorizontalBt;
     case CSSPropertyWhiteSpace: // normal | pre | nowrap
         return valueID == CSSValueNormal || valueID == CSSValuePre || valueID == CSSValuePreWrap || valueID == CSSValuePreLine || valueID == CSSValueNowrap;
-    case CSSPropertyWordBreak: // normal | break-all | break-word (this is a custom extension)
-        return valueID == CSSValueNormal || valueID == CSSValueBreakAll || valueID == CSSValueBreakWord;
+    case CSSPropertyWordBreak: // normal | break-all | keep-all | break-word (this is a custom extension)
+        return valueID == CSSValueNormal || valueID == CSSValueBreakAll || valueID == CSSValueKeepAll || valueID == CSSValueBreakWord;
     default:
         ASSERT_NOT_REACHED();
         return false;