DevTools: Show asynchronous call stacks on frontend.

Source/devtools/front_end/SettingsScreen.js

Index: Source/devtools/front_end/SettingsScreen.js
diff --git a/Source/devtools/front_end/SettingsScreen.js b/Source/devtools/front_end/SettingsScreen.js
index 1ba521189203f5ae401ccb0d41712629d25a5968..f6313def8f61d51f4bac45f9161d7e88d3341614 100644
--- a/Source/devtools/front_end/SettingsScreen.js
+++ b/Source/devtools/front_end/SettingsScreen.js
@@ -83,7 +83,7 @@ WebInspector.SettingsScreen.regexValidator = function(text)
  */
 WebInspector.SettingsScreen.integerValidator = function(min, max, text)
 {
-    var value = parseInt(text, 10);
+    var value = Number(text);
     if (isNaN(value))
         return "Invalid number format";
     if (value < min || value > max)
@@ -395,6 +395,8 @@ WebInspector.GenericSettingsTab = function()
     WebInspector.settings.skipStackFramesSwitch.addChangeListener(this._skipStackFramesSwitchOrPatternChanged, this);
     WebInspector.settings.skipStackFramesPattern.addChangeListener(this._skipStackFramesSwitchOrPatternChanged, this);
 
+    p.appendChild(WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("Enable async stack traces"), WebInspector.settings.enableAsyncStackTraces));
+
     p = this._appendSection(WebInspector.UIString("Profiler"));
     p.appendChild(WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("Show advanced heap snapshot properties"), WebInspector.settings.showAdvancedHeapSnapshotProperties));
     p.appendChild(WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("High resolution CPU profiling"), WebInspector.settings.highResolutionCpuProfiling));