Add media size select element and ticket item. Do not expose in the UI yet.

chrome/browser/ui/webui/print_preview/print_preview_ui.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_ui.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui.cc b/chrome/browser/ui/webui/print_preview/print_preview_ui.cc
index 5c9122a5b191582d021808e4e01748a433a32508..959aa486a64f043279652dd2aa394e85f5a16c3d 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui.cc
@@ -272,6 +272,8 @@ content::WebUIDataSource* CreatePrintPreviewUISource() {
   source->AddLocalizedString("bottom", IDS_PRINT_PREVIEW_BOTTOM_MARGIN_LABEL);
   source->AddLocalizedString("left", IDS_PRINT_PREVIEW_LEFT_MARGIN_LABEL);
   source->AddLocalizedString("right", IDS_PRINT_PREVIEW_RIGHT_MARGIN_LABEL);
+  source->AddLocalizedString("mediaSizeLabel",
+                             IDS_PRINT_PREVIEW_MEDIA_SIZE_LABEL);
   source->AddLocalizedString("destinationSearchTitle",
                              IDS_PRINT_PREVIEW_DESTINATION_SEARCH_TITLE);
   source->AddLocalizedString("userInfo", IDS_PRINT_PREVIEW_USER_INFO);