Don't use mock PagePopup if possible.

LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html

Index: LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html
diff --git a/LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html b/LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html
index 664333c30fb6e5a62acb2e38b724f22c8c9a7a61..763c8af2f44a860550b9fed4832eca3d2dd0224f 100644
--- a/LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html
+++ b/LayoutTests/fast/forms/calendar-picker/calendar-picker-datetimelocal-with-step.html
@@ -14,7 +14,7 @@
 description('Test if step limits available dates in calendar picker on datetime input.');
 
 document.getElementById('datetime-bare').value = '2012-11-20T00:00';
-openPickerWithMock(document.getElementById('datetime-bare'), test1);
+openPicker(document.getElementById('datetime-bare'), test1);
 
 function test1() {
     debug("Step without value, min nor max attributes.");
@@ -26,7 +26,7 @@ function test1() {
 }
 
 function test1AfterClose() {
-    openPickerWithMock(document.getElementById('datetime'), test2);
+    openPicker(document.getElementById('datetime'), test2);
 }
 
 function test2() {
@@ -42,7 +42,7 @@ function test2AfterClose() {
     document.getElementById('datetime').min = '2012-11-16T12:00';
 
     // Reopen popup
-    openPickerWithMock(document.getElementById('datetime'), test3);
+    openPicker(document.getElementById('datetime'), test3);
 }
 
 function test3() {
@@ -58,7 +58,7 @@ function test3AfterClose() {
     document.getElementById('datetime').max = '2012-11-20T00:00';
 
     // Reopen popup
-    openPickerWithMock(document.getElementById('datetime'), test4);
+    openPicker(document.getElementById('datetime'), test4);
 }
 
 function test4() {