DevTools: update console viewport scroll when prompt is resized

third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html

Index: third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html
diff --git a/third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html b/third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html
index d183a277fc3bfe172d0d9d5bc6f0f49917c0ac83..b61619d9a660b010a9ac94297a2e08acd27afb77 100644
--- a/third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html
+++ b/third_party/WebKit/LayoutTests/inspector/console/console-viewport-stick-to-bottom.html
@@ -77,13 +77,14 @@ function test()
             dumpAndContinue(next);
         },
 
-        function testTypingShouldJumpToBottom(next)
+        function testChangingPromptTextShouldJumpToBottom(next)
         {
-            var keyEvent = InspectorTest.createKeyEvent("a");
-            viewport._contentElement.dispatchEvent(keyEvent);
-            consoleView._promptElement.dispatchEvent(new Event('input'));
+            InspectorTest.addSniffer(Console.ConsoleView.prototype, "_promptContentChangedForTest", onContentChanged);
+            consoleView._prompt._editor.setText('a');
 
-            dumpAndContinue(next);
+            function onContentChanged() {
+                dumpAndContinue(next);
+            }
         },
 
         function testViewportMutationsShouldPreserveStickToBottom(next)