[DevTools] Fixed multiline error messages

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

 var initialize_ConsoleTest = function() {
 
 InspectorTest.preloadModule("source_frame");
 InspectorTest.preloadPanel("console");
 
 InspectorTest.evaluateInConsole = function(code, callback)
 {
     callback = InspectorTest.safeWrap(callback);
 
     var consoleView = WebInspector.ConsolePanel._view();
@@ skipping 239 matching lines @@
                         if (deepFilter(treeElement))
                             treeElement.expand();
                     }
                 }
             }
         }
         InspectorTest.runAfterPendingDispatches(callback);
     }
 }
 
+InspectorTest.expandConsoleMessagesErrorParameters = function(callback)
+{
+    var messageViews = WebInspector.ConsolePanel._view()._visibleViewMessages;
+    // Initiate round-trips to fetch necessary data for further rendering.
+    for (var i = 0; i < messageViews.length; ++i)
+        messageViews[i].contentElement();
+    InspectorTest.runAfterPendingDispatches(expandErrorParameters);
+    function expandErrorParameters()
+    {
+        for (var i = 0; i < messageViews.length; ++i) {
+            var element = messageViews[i].contentElement();
+            var spans = element.querySelectorAll("span.object-value-error");
+            for (var j = 0; j < spans.length; ++j) {
+                var links = spans[j].querySelectorAll("a");
+                for (var k = 0; k < links.length; ++k) {
+                    var link = links[k];
+                    if (link && link._showDetailedForTest)
+                        link._showDetailedForTest();
+                }
+            }
+        }
+        callback();
+    }
+}
+
 InspectorTest.waitForRemoteObjectsConsoleMessages = function(callback)
 {
     var messages = WebInspector.ConsolePanel._view()._visibleViewMessages;
     for (var i = 0; i < messages.length; ++i)
         messages[i].toMessageElement();
     InspectorTest.runAfterPendingDispatches(callback);
 }
 
 InspectorTest.checkConsoleMessagesDontHaveParameters = function()
 {
@@ skipping 57 matching lines @@
         if (consoleView._visibleViewMessages.length === expectedCount) {
             InspectorTest.addResult("Message count: " + expectedCount);
             callback();
         } else {
             InspectorTest.addSniffer(consoleView, "_messageAppendedForTests", checkAndReturn);
         }
     }
 }
 
 }