Speedup some slow running stack-overflow tests.

test/mjsunit/regress/regress-crbug-505007-2.js

Index: test/mjsunit/regress/regress-crbug-505007-2.js
diff --git a/test/mjsunit/regress/regress-crbug-505007-2.js b/test/mjsunit/regress/regress-crbug-505007-2.js
index dfa34ae6adec495615ef73a2f5c97aa21f5f415c..96014c848d4263d75d79b127ab63be18a2feed40 100644
--- a/test/mjsunit/regress/regress-crbug-505007-2.js
+++ b/test/mjsunit/regress/regress-crbug-505007-2.js
@@ -5,11 +5,16 @@
 // Flags: --stack-size=100 --allow-natives-syntax
 
 function g() {}
+
+var count = 0;
 function f() {
   try {
     f();
   } catch(e) {
-    %ExecuteInDebugContext(g);
+    if (count < 100) {
+      count++;
+      %ExecuteInDebugContext(g);
+    }
   }
 }
 f();