DevTools: add more logging to console-viewport-selection.html

LayoutTests/inspector/console/console-viewport-selection.html

Index: LayoutTests/inspector/console/console-viewport-selection.html
diff --git a/LayoutTests/inspector/console/console-viewport-selection.html b/LayoutTests/inspector/console/console-viewport-selection.html
index e767977ce2c7833d44d5b74abe2a31518b43bdbc..1511078cad2ce3f6e3e896be51c47f42405ead0e 100644
--- a/LayoutTests/inspector/console/console-viewport-selection.html
+++ b/LayoutTests/inspector/console/console-viewport-selection.html
@@ -21,12 +21,14 @@ function test()
         function verifyViewportIsTallEnough(next)
         {
             viewport.invalidate();
-            var viewportMessagesCount = viewport._lastVisibleIndex - viewport._firstVisibleIndex;
+            viewport.forceScrollItemToBeFirst(0);
+            var viewportMessagesCount = viewport._lastVisibleIndex - viewport._firstVisibleIndex + 1;
             if (viewportMessagesCount < minimumViewportMessagesCount) {
                 InspectorTest.addResult(String.sprintf("Test cannot be run as viewport is not tall enough. It is required to contain at least %d messages, but %d only fit", minimumViewportMessagesCount, viewportMessagesCount));
                 InspectorTest.completeTest();
                 return;
             }
+            InspectorTest.addResult(String.sprintf("Viewport contains %d messages", viewportMessagesCount));
             next();
         },
 
@@ -34,6 +36,7 @@ function test()
         {
             selectMessages(middleMessage, 2, middleMessage, 7);
             dumpSelectionText();
+            dumpBottom();
             next();
         },
 
@@ -41,6 +44,7 @@ function test()
         {
             selectMessages(middleMessage, 7, middleMessage, 2);
             dumpSelectionText();
+            dumpBottom();
             next();
         },
 
@@ -48,6 +52,7 @@ function test()
         {
             selectMessages(middleMessage - 1, 4, middleMessage + 1, 7);
             dumpSelectionText();
+            dumpBottom();
             next();
         },