[mjsunit] Fix webkit/run-json-stringify in Debug mode again

Clang is known to use a lot of stack space for Debug builds, so
this patch lowers the recursion depth of that test.

Failing bot:

https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux%20-%20full%20debug

First failing run:

https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux%20-%20full%20debug/6606

Change-Id: Ib1da016b190fa0d9d7d38bced19f600a284c7f01
Reviewed-on: https://chromium-review.googlesource.com/c/1396079
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58555}

test/webkit/resources/JSON-stringify.js

@@ -481,20 +481,20 @@ function createTests() {
     });
     result.push(function (jsonObject){
         var deepObject = {};
-        for (var i = 0; i < 915; i++)
+        for (var i = 0; i < 700; i++)
             deepObject = {next:deepObject};
         return jsonObject.stringify(deepObject);
     });
     result.push(function (jsonObject){
         var deepArray = [];
-        for (var i = 0; i < 1024; i++)
+        for (var i = 0; i < 800; i++)
             deepArray = [deepArray];
         return jsonObject.stringify(deepArray);
     });
     result.push(function (jsonObject){
         var depth = 0;
         function toDeepVirtualJSONObject() {
-            if (++depth >= 915)
+            if (++depth >= 700)
                 return {};
             var r = {};
             r.toJSON = toDeepVirtualJSONObject;

test/webkit/run-json-stringify-expected.txt

@@ -499,14 +499,14 @@ function (jsonObject){
 PASS tests[i](nativeJSON) is tests[i](JSON)
 function (jsonObject){
         var deepObject = {};
-        for (var i = 0; i < 915; i++)
+        for (var i = 0; i < 700; i++)
             deepObject = {next:deepObject};
         return jsonObject.stringify(deepObject);
     }
 PASS tests[i](nativeJSON) is tests[i](JSON)
 function (jsonObject){
         var deepArray = [];
-        for (var i = 0; i < 1024; i++)
+        for (var i = 0; i < 800; i++)
             deepArray = [deepArray];
         return jsonObject.stringify(deepArray);
     }
@@ -514,7 +514,7 @@ PASS tests[i](nativeJSON) is tests[i](JSON)
 function (jsonObject){
         var depth = 0;
         function toDeepVirtualJSONObject() {
-            if (++depth >= 915)
+            if (++depth >= 700)
                 return {};
             var r = {};
             r.toJSON = toDeepVirtualJSONObject;