Refactored compound selector parsing methods.

Source/core/css/parser/CSSSelectorParserTest.cpp

Index: Source/core/css/parser/CSSSelectorParserTest.cpp
diff --git a/Source/core/css/parser/CSSSelectorParserTest.cpp b/Source/core/css/parser/CSSSelectorParserTest.cpp
index b3a52cd2b4daeb0bca50aea7f07edd5b26cd8ea2..fe9dbbd7b4dbcdfe489fce692d7e5fcc52058d09 100644
--- a/Source/core/css/parser/CSSSelectorParserTest.cpp
+++ b/Source/core/css/parser/CSSSelectorParserTest.cpp
@@ -5,6 +5,7 @@
 #include "config.h"
 #include "core/css/parser/CSSSelectorParser.h"
 
+#include "core/css/CSSSelectorList.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include <gtest/gtest.h>
 
@@ -112,4 +113,24 @@ TEST(CSSSelectorParserTest, InvalidANPlusB)
     }
 }
 
+TEST(CSSSelectorParserTest, ContentPseudoInCompound)
+{
+    const char* testCases[][2] = {
+        { "::content", "*::content" }, // crbug.com/478969
+        { ".a::content", ".a::content" },
+        { "::content.a", ".a::content" },
+        { "::content.a.b", ".b.a::content" },
+        { ".a::content.b", ".b.a::content" },
+    };
+
+    for (unsigned i = 0; i < WTF_ARRAY_LENGTH(testCases); ++i) {
+        SCOPED_TRACE(testCases[i][0]);
+        CSSTokenizer::Scope scope(testCases[i][0]);
+        CSSParserTokenRange range = scope.tokenRange();
+        CSSSelectorList list;
+        CSSSelectorParser::parseSelector(range, CSSParserContext(HTMLStandardMode, nullptr), nullAtom, nullptr, list);
+        EXPECT_STREQ(testCases[i][1], list.selectorsText().ascii().data());
+    }
+}
+
 } // namespace