Marked parsing as failed for invalid compound.

third_party/WebKit/Source/core/css/parser/CSSSelectorParserTest.cpp

 // Copyright 2015 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 "core/css/parser/CSSSelectorParser.h"
 
 #include "core/css/CSSSelectorList.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 172 matching lines @@
         "::shadow.class",
         "::selection:window-inactive::before",
         "::-webkit-volume-slider.class",
         "::content.a",
         "::content.a.b",
         ".a::content.b",
         "::before:not(.a)",
         "::shadow:not(::after)",
         "::content:not(#id)",
         "::-webkit-scrollbar:vertical:not(:first-child)",
-        "video::-webkit-media-text-track-region-container.scrolling"
+        "video::-webkit-media-text-track-region-container.scrolling",
+        "div ::before.a"
     };
 
     for (auto testCase : testCases) {
         CSSTokenizer::Scope scope(testCase);
         CSSParserTokenRange range = scope.tokenRange();
         CSSSelectorList list = CSSSelectorParser::parseSelector(range, CSSParserContext(HTMLStandardMode, nullptr), nullptr);
         EXPECT_FALSE(list.isValid());
     }
 }
 
@@ skipping 94 matching lines @@
         SCOPED_TRACE(testCase[0]);
         CSSTokenizer::Scope scope(testCase[0]);
         CSSParserTokenRange range = scope.tokenRange();
         CSSSelectorList list = CSSSelectorParser::parseSelector(range, context, sheet.get());
         EXPECT_TRUE(list.isValid());
         EXPECT_STREQ(testCase[1], list.selectorsText().ascii().data());
     }
 }
 
 } // namespace blink