Merge 98454 - Web Inspector: Debugger fails when there is an invalid watch expression.

LayoutTests/inspector/debugger/error-in-watch-expressions.html

Index: LayoutTests/inspector/debugger/error-in-watch-expressions.html
===================================================================
--- LayoutTests/inspector/debugger/error-in-watch-expressions.html	(revision 98581)
+++ LayoutTests/inspector/debugger/error-in-watch-expressions.html	(working copy)
@@ -7,15 +7,24 @@
 
 var test = function()
 {
+    // We need to initialize scripts panel so that watch expressions section is created.
+    WebInspector.showPanel("scripts");
+
     var watchExpressionsSection = WebInspector.panels.scripts.sidebarPanes.watchExpressions.section;
-    watchExpressionsSection.addExpression();
-    watchExpressionsSection.watchExpressions[0] = "#$%";
+    watchExpressionsSection.watchExpressions = [];
+    watchExpressionsSection.watchExpressions.push("#$%");
     watchExpressionsSection.update();
+
     InspectorTest.runAfterPendingDispatches(step1);
 
     function step1()
     {
         InspectorTest.addResult(watchExpressionsSection.element.innerHTML.indexOf("watch-expressions-error-level") !== -1 ? "SUCCESS" : "FAILED");
+
+        // Clear watch expressions after execution.
+        watchExpressionsSection.watchExpressions = [];
+        watchExpressionsSection.update();
+
         InspectorTest.completeTest();
     }
 }