Setting page selector text should not allow brace

third_party/WebKit/Source/core/css/CSSPageRuleTest.cpp

 // 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.
 
 #include "core/css/CSSPageRule.h"
 
 #include "core/css/CSSRuleList.h"
 #include "core/css/CSSTestHelper.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 24 matching lines @@
     ASSERT(helper.cssRules());
     EXPECT_EQ(1u, helper.cssRules()->length());
 
     CSSPageRule* pageRule = toCSSPageRule(helper.cssRules()->item(0));
     EXPECT_EQ(":left", pageRule->selectorText());
 
     // set invalid page selector.
     pageRule->setSelectorText(":hover");
     EXPECT_EQ(":left", pageRule->selectorText());
 
+    // set invalid page selector.
+    pageRule->setSelectorText("right { bla");
+    EXPECT_EQ(":left", pageRule->selectorText());
+
     // set page pseudo class selector.
     pageRule->setSelectorText(":right");
     EXPECT_EQ(":right", pageRule->selectorText());
 
     // set page type selector.
     pageRule->setSelectorText("namedpage");
     EXPECT_EQ("namedpage", pageRule->selectorText());
 }
 
 } // namespace blink