[test] Shorten excessive webkit test.

test/webkit/fast/js/excessive-comma-usage.js

Index: test/webkit/fast/js/excessive-comma-usage.js
diff --git a/test/webkit/fast/js/excessive-comma-usage.js b/test/webkit/fast/js/excessive-comma-usage.js
index d30ff6d0f88a0d8112384def59f68946a35cf57f..414b29b7ef4d82c948b5b39dd9f7db2a9c578a44 100644
--- a/test/webkit/fast/js/excessive-comma-usage.js
+++ b/test/webkit/fast/js/excessive-comma-usage.js
@@ -24,17 +24,17 @@
 description("Test that we can handle excessively large initializer lists");
 
 var initializerTestString = "var a=0";
-for (var i = 0; i < 50000; i++)
+for (var i = 0; i < 5000; i++)
     initializerTestString += ",a"+i+"="+i;
 initializerTestString += ";return true;";
 
 var declarationTestString = "var a";
-for (var i = 0; i < 50000; i++)
+for (var i = 0; i < 5000; i++)
     declarationTestString += ",a"+i;
 declarationTestString += ";return true;";
 
 var commaExpressionTestString = "1";
-for (var i = 0; i < 50000; i++)
+for (var i = 0; i < 5000; i++)
     commaExpressionTestString += ",1";
 commaExpressionTestString += ";return true;";