Add most missing blink files to .gn files

third_party/WebKit/Source/core/css/BUILD.gn

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("css") {
   split_count = 5
   sources = [
     "ActiveStyleSheets.cpp",
@@ skipping 55 matching lines @@
     "CSSGradientValue.cpp",
     "CSSGradientValue.h",
     "CSSGridAutoRepeatValue.cpp",
     "CSSGridAutoRepeatValue.h",
     "CSSGridLineNamesValue.cpp",
     "CSSGridLineNamesValue.h",
     "CSSGridTemplateAreasValue.cpp",
     "CSSGridTemplateAreasValue.h",
     "CSSGroupingRule.cpp",
     "CSSGroupingRule.h",
+    "CSSHelper.h",
     "CSSIdentifierValue.cpp",
     "CSSIdentifierValue.h",
     "CSSImageGeneratorValue.cpp",
     "CSSImageGeneratorValue.h",
     "CSSImageSetValue.cpp",
     "CSSImageSetValue.h",
     "CSSImageValue.cpp",
     "CSSImageValue.h",
     "CSSImportRule.cpp",
     "CSSImportRule.h",
@@ skipping 23 matching lines @@
     "CSSPathValue.h",
     "CSSPendingSubstitutionValue.cpp",
     "CSSPendingSubstitutionValue.h",
     "CSSPrimitiveValue.cpp",
     "CSSPrimitiveValue.h",
     "CSSPrimitiveValueMappings.h",
     "CSSProperty.cpp",
     "CSSProperty.h",
     "CSSPropertyEquality.cpp",
     "CSSPropertyEquality.h",
+    "CSSPropertyIDTemplates.h",
     "CSSPropertySourceData.cpp",
     "CSSPropertySourceData.h",
     "CSSQuadValue.cpp",
     "CSSQuadValue.h",
     "CSSReflectValue.cpp",
     "CSSReflectValue.h",
+    "CSSReflectionDirection.h",
     "CSSRule.cpp",
     "CSSRule.h",
     "CSSRuleList.cpp",
     "CSSRuleList.h",
     "CSSSegmentedFontFace.cpp",
     "CSSSegmentedFontFace.h",
     "CSSSelector.cpp",
     "CSSSelector.h",
     "CSSSelectorList.cpp",
     "CSSSelectorList.h",
@@ skipping 196 matching lines @@
     "parser/CSSLazyParsingState.cpp",
     "parser/CSSLazyParsingState.h",
     "parser/CSSLazyPropertyParserImpl.cpp",
     "parser/CSSLazyPropertyParserImpl.h",
     "parser/CSSParser.cpp",
     "parser/CSSParser.h",
     "parser/CSSParserContext.cpp",
     "parser/CSSParserContext.h",
     "parser/CSSParserFastPaths.cpp",
     "parser/CSSParserFastPaths.h",
+    "parser/CSSParserIdioms.h",
     "parser/CSSParserImpl.cpp",
     "parser/CSSParserImpl.h",
     "parser/CSSParserMode.h",
+    "parser/CSSParserObserver.h",
     "parser/CSSParserObserverWrapper.cpp",
     "parser/CSSParserObserverWrapper.h",
     "parser/CSSParserSelector.cpp",
     "parser/CSSParserSelector.h",
     "parser/CSSParserToken.cpp",
     "parser/CSSParserToken.h",
     "parser/CSSParserTokenRange.cpp",
     "parser/CSSParserTokenRange.h",
     "parser/CSSPropertyParser.cpp",
     "parser/CSSPropertyParser.h",
@@ skipping 131 matching lines @@
     "properties/CSSPropertyAlignmentUtils.cpp",
     "properties/CSSPropertyAlignmentUtils.h",
     "properties/CSSPropertyColumnUtils.cpp",
     "properties/CSSPropertyColumnUtils.h",
     "properties/CSSPropertyFontUtils.cpp",
     "properties/CSSPropertyFontUtils.h",
     "properties/CSSPropertyLengthUtils.cpp",
     "properties/CSSPropertyLengthUtils.h",
     "properties/CSSPropertyMarginUtils.cpp",
     "properties/CSSPropertyMarginUtils.h",
+    "properties/CSSPropertyPositionUtils.h",
     "properties/CSSPropertyShapeUtils.cpp",
     "properties/CSSPropertyShapeUtils.h",
     "resolver/AnimatedStyleBuilder.cpp",
     "resolver/AnimatedStyleBuilder.h",
+    "resolver/CSSPropertyPriority.h",
     "resolver/CSSToStyleMap.cpp",
     "resolver/CSSToStyleMap.h",
     "resolver/CSSVariableResolver.cpp",
     "resolver/CSSVariableResolver.h",
     "resolver/ElementResolveContext.cpp",
     "resolver/ElementResolveContext.h",
     "resolver/ElementStyleResources.cpp",
     "resolver/ElementStyleResources.h",
     "resolver/FilterOperationResolver.cpp",
     "resolver/FilterOperationResolver.h",
@@ skipping 29 matching lines @@
     "resolver/TransformBuilder.h",
     "resolver/ViewportStyleResolver.cpp",
     "resolver/ViewportStyleResolver.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }