Added available bit to m_selectorIndex.

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

Index: third_party/WebKit/Source/core/css/RuleSetTest.cpp
diff --git a/third_party/WebKit/Source/core/css/RuleSetTest.cpp b/third_party/WebKit/Source/core/css/RuleSetTest.cpp
index de54ff6caca0eab47de60089f43bd35e106629c9..a1fdff3f848833b3c2f6f8e1285d1604afe80191 100644
--- a/third_party/WebKit/Source/core/css/RuleSetTest.cpp
+++ b/third_party/WebKit/Source/core/css/RuleSetTest.cpp
@@ -31,6 +31,7 @@
 
 #include "core/css/CSSTestHelper.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
@@ -195,4 +196,21 @@ TEST(RuleSetTest, findBestRuleSetAndAdd_HostContextAndClass) {
   ASSERT_EQ(0u, rules->size());
 }
 
+TEST(RuleSetTest, SelectorIndexLimit) {
+  StringBuilder builder;
+
+  for (unsigned i = 0; i < 16383; i++)
+    builder.append("div,");
+
+  builder.append("b,span {}");
+
+  CSSTestHelper helper;
+  helper.addCSSRules(builder.toString().ascii().data());
+  const RuleSet& ruleSet = helper.ruleSet();
+  const HeapTerminatedArray<RuleData>* rules = ruleSet.tagRules("b");
+  ASSERT_EQ(1u, rules->size());
+  EXPECT_EQ("b", rules->at(0).selector().tagQName().localName());
+  EXPECT_FALSE(ruleSet.tagRules("span"));
+}
+
 }  // namespace blink