DevTools: fix stick to bottom in console viewport

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

 var initialize_ConsoleTest = function() {
 
 InspectorTest.preloadModule("source_frame");
 InspectorTest.preloadPanel("console");
 
 InspectorTest.selectMainExecutionContext = function()
 {
     var executionContexts = InspectorTest.mainTarget.runtimeModel.executionContexts();
     for (var context of executionContexts) {
         if (context.isDefault) {
@@ skipping 362 matching lines @@
     function override()
     {
         if (--count === 0)
             InspectorTest.safeWrap(callback)();
         else
             InspectorTest.addSniffer(InspectorTest.consoleModel, "addMessage", override, false);
     }
     InspectorTest.addSniffer(InspectorTest.consoleModel, "addMessage", override, false);
 }
 
+// /**
+//  * @param {Function} callback
+//  * @param {Number} timeout
+//  */
+// InspectorTest.waitForUserScrollDelay = function(callback, timeout)
+// {
+//     timeout = timeout || 400;
+//     setTimeout(afterDelay, timeout);
+//     InspectorTest.addSniffer(WebInspector.ConsoleView.prototype, "_scrollUpdatedByUserForTest", onUserScroll);
+//     var scrollReceivedOrTimeout = false;
+
+//     function onUserScroll()
+//     {
+//         if (!scrollReceivedOrTimeout) {
+//             scrollReceivedOrTimeout = true;
+//             callback(true);
+//         }
+//     }
+
+//     function afterDelay()
+//     {
+//         if (!scrollReceivedOrTimeout) {
+//             scrollReceivedOrTimeout = false;
+//             callback(false);
+//         }
+
+//     }
+// }
+
 InspectorTest.changeExecutionContext = function(namePrefix)
 {
     var selector = WebInspector.ConsoleView.instance()._executionContextModel._selectElement;
     var option = selector.firstChild;
     while (option) {
         if (option.textContent && option.textContent.startsWith(namePrefix))
             break;
         option = option.nextSibling;
     }
     if (!option) {
@@ skipping 14 matching lines @@
         if (consoleView._visibleViewMessages.length === expectedCount) {
             InspectorTest.addResult("Message count: " + expectedCount);
             callback();
         } else {
             InspectorTest.addSniffer(consoleView, "_messageAppendedForTests", checkAndReturn);
         }
     }
 }
 
 }