Add deprecation warning banner to App Launcher on Windows and Linux.

ui/app_list/views/app_list_view_unittest.cc

Index: ui/app_list/views/app_list_view_unittest.cc
diff --git a/ui/app_list/views/app_list_view_unittest.cc b/ui/app_list/views/app_list_view_unittest.cc
index 477875f115825e7335cf61125217baa6a878ddd6..b2631379a7c6a4eaa47666b9ba8da8b0908901d4 100644
--- a/ui/app_list/views/app_list_view_unittest.cc
+++ b/ui/app_list/views/app_list_view_unittest.cc
@@ -298,9 +298,14 @@ void AppListViewTestContext::RunDisplayTest() {
 
   Show();
 
+#if defined(OS_CHROMEOS)
   // Explicitly enforce the exact dimensions of the app list. Feel free to
   // change these if you need to (they are just here to prevent against
   // accidental changes to the window size).
+  //
+  // Note: Only test this on Chrome OS; the deprecation banner on other
+  // platforms makes the height variable so we can't reliably test it (nor do we
+  // really need to).
   switch (test_type_) {
     case NORMAL:
       EXPECT_EQ("400x500", view_->bounds().size().ToString());
@@ -318,6 +323,7 @@ void AppListViewTestContext::RunDisplayTest() {
       NOTREACHED();
       break;
   }
+#endif  // defined(OS_CHROMEOS)
 
   if (is_landscape())
     EXPECT_EQ(2, GetPaginationModel()->total_pages());