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

 var initialize_DebuggerTest = function() {
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
 {
     if (quiet !== undefined)
         InspectorTest._quiet = quiet;
     WebInspector.showPanel("scripts");
 
     if (WebInspector.debuggerModel.debuggerEnabled())
         startTest();
@@ skipping 92 matching lines @@
         InspectorTest._waitUntilResumedCallback = callback;
 };
 
 InspectorTest.resumeExecution = function(callback)
 {
     if (WebInspector.panels.scripts.paused)
         WebInspector.panels.scripts._togglePause();
     InspectorTest.waitUntilResumed(callback);
 };
 
-InspectorTest.captureStackTrace = function(callFrames, dropLineNumbers)
+// FIXME: upstream showColumnNumbers field perhaps upstreaming as
+// dropColumnNumbers instead.  JavaScript and Dart both support column numbers
+// so upstreaming this change wis very reasonable. dartbug.com/13378
+InspectorTest.captureStackTrace = function(callFrames, dropLineNumbers, showColumnNumbers)
 {
     InspectorTest.addResult("Call stack:");
     for (var i = 0; i < callFrames.length; i++) {
         var frame = callFrames[i];
         var script = WebInspector.debuggerModel.scriptForId(frame.location.scriptId);
         var url;
         var lineNumber;
+        var columnNumber;
         if (script) {
             url = WebInspector.displayNameForURL(script.sourceURL);
             lineNumber = frame.location.lineNumber + 1;
+            columnNumber = frame.location.columnNumber + 1;
         } else {
             url = "(internal script)";
             lineNumber = "(line number)";
+            columnNumber = "(column number)";
         }
-        var s = "    " + i + ") " + frame.functionName + " (" + url + (dropLineNumbers ? "" : ":" + lineNumber) + ")";
+        var s = "    " + i + ") " + frame.functionName + " (" + url + (dropLineNumbers ? "" : ":" + lineNumber + (showColumnNumbers ?  ":" + columnNumber : "")) + ")";
         InspectorTest.addResult(s);
     }
 };
 
 InspectorTest.dumpSourceFrameContents = function(sourceFrame)
 {
     InspectorTest.addResult("==Source frame contents start==");
     var textEditor = sourceFrame._textEditor;
     for (var i = 0; i < textEditor.linesCount; ++i)
         InspectorTest.addResult(textEditor.line(i));
@@ skipping 169 matching lines @@
 
 InspectorTest.checkUILocation = function(uiSourceCode, lineNumber, columnNumber, location)
 {
     InspectorTest.assertEquals(uiSourceCode, location.uiSourceCode, "Incorrect uiSourceCode, expected '" + (uiSourceCode ? uiSourceCode.originURL() : null) + "'," +
                                                                     " but got '" + (location.uiSourceCode ? location.uiSourceCode.originURL() : null) + "'");
     InspectorTest.assertEquals(lineNumber, location.lineNumber, "Incorrect lineNumber, expected '" + lineNumber + "', but got '" + location.lineNumber + "'");
     InspectorTest.assertEquals(columnNumber, location.columnNumber, "Incorrect columnNumber, expected '" + columnNumber + "', but got '" + location.columnNumber + "'");
 };
 
 };