Revert increased limit for 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 a1fdff3f848833b3c2f6f8e1285d1604afe80191..46aaf5e5847411e566b6b944887779aac3aadd0d 100644
--- a/third_party/WebKit/Source/core/css/RuleSetTest.cpp
+++ b/third_party/WebKit/Source/core/css/RuleSetTest.cpp
@@ -199,7 +199,10 @@ TEST(RuleSetTest, findBestRuleSetAndAdd_HostContextAndClass) {
 TEST(RuleSetTest, SelectorIndexLimit) {
   StringBuilder builder;
 
-  for (unsigned i = 0; i < 16383; i++)
+  // We use 13 bits to storing the selector start index in RuleData. This is a
+  // test to check that we don't regress. We WONTFIX issues asking for more
+  // since 2^13 simple selectors in a style rule is already excessive.
+  for (unsigned i = 0; i < 8191; i++)
     builder.append("div,");
 
   builder.append("b,span {}");