[DevTools] increase AsyncCallStackDepth to 8

third_party/WebKit/LayoutTests/http/tests/inspector/debugger-test.js

 function scheduleTestFunction()
 {
     setTimeout(testFunction, 0);
 }
 
 var initialize_DebuggerTest = function() {
 
 InspectorTest.preloadPanel("sources");
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
@@ skipping 86 matching lines @@
 InspectorTest.runTestFunctionAndWaitUntilPausedPromise = function()
 {
     var cb;
     var p = new Promise(fullfill => cb = fullfill);
     InspectorTest.runTestFunctionAndWaitUntilPaused(cb);
     return p;
 }
 
 InspectorTest.runAsyncCallStacksTest = function(totalDebuggerStatements, maxAsyncCallStackDepth)
 {
+    var defaultMaxAsyncCallStackDepth = 8;
+
     InspectorTest.setQuiet(true);
     InspectorTest.startDebuggerTest(step1);
 
     function step1()
     {
-        InspectorTest.DebuggerAgent.setAsyncCallStackDepth(maxAsyncCallStackDepth, step2);
+        InspectorTest.DebuggerAgent.setAsyncCallStackDepth(maxAsyncCallStackDepth || defaultMaxAsyncCallStackDepth, step2);
     }
 
     function step2()
     {
         InspectorTest.runTestFunctionAndWaitUntilPaused(didPause);
     }
 
     var step = 0;
     var callStacksOutput = [];
     function didPause(callFrames, reason, breakpointIds, asyncStackTrace)
@@ skipping 599 matching lines @@
 {
     var textEditor = sourceFrame._textEditor;
     var lineLength = textEditor.line(lineNumber).length;
     var lineRange = new Common.TextRange(lineNumber, 0, lineNumber, lineLength);
     var bookmarks = textEditor.bookmarks(lineRange, Sources.JavaScriptSourceFrame.BreakpointDecoration._bookmarkSymbol);
     bookmarks.sort((bookmark1, bookmark2) => bookmark1.position().startColumn - bookmark2.position().startColumn);
     bookmarks[index][Sources.JavaScriptSourceFrame.BreakpointDecoration._elementSymbolForTest].click();
 }
 
 };