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

Source/core/css/parser/CSSParserFastPaths.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/css/parser/CSSParserFastPaths.h"
 
 #include "core/StylePropertyShorthand.h"
 #include "core/css/CSSFunctionValue.h"
 #include "core/css/CSSValuePool.h"
@@ skipping 339 matching lines @@
     case CSSPropertyWebkitUserDrag: // auto | none | element
         return valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueElement;
     case CSSPropertyWebkitUserModify: // read-only | read-write
         return valueID == CSSValueReadOnly || valueID == CSSValueReadWrite || valueID == CSSValueReadWritePlaintextOnly;
     case CSSPropertyWebkitUserSelect: // auto | none | text | all
         return valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueText || valueID == CSSValueAll;
     case CSSPropertyWebkitWritingMode:
         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;
     }
 }
 
 bool CSSParserFastPaths::isKeywordPropertyID(CSSPropertyID propertyId)
 {
     switch (propertyId) {
     case CSSPropertyAll:
@@ skipping 291 matching lines @@
     if (RefPtrWillBeRawPtr<CSSValue> color = parseColorValue(propertyID, string, parserMode))
         return color.release();
     if (RefPtrWillBeRawPtr<CSSValue> keyword = parseKeywordValue(propertyID, string))
         return keyword.release();
     if (RefPtrWillBeRawPtr<CSSValue> transform = parseSimpleTransform(propertyID, string))
         return transform.release();
     return nullptr;
 }
 
 } // namespace blink