Print preview page selection should not require a rerendering of draft pages.

chrome/common/print_messages.h

Index: chrome/common/print_messages.h
diff --git a/chrome/common/print_messages.h b/chrome/common/print_messages.h
index ee5bf448567f79c4e2684c93db1211cc49646804..f3c8c1fa94b994605e42f7ee4be0d988f3e2f379 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -192,11 +192,7 @@ IPC_MESSAGE_ROUTED0(PrintMsg_PrintForSystemDialog)
 IPC_MESSAGE_ROUTED0(PrintMsg_ResetScriptedPrintCount)
 
 // Tells a renderer to continue generating the print preview.
-// Use |requested_preview_page_index| to request a specific preview page data.
-// |requested_preview_page_index| is 1-based or |printing::INVALID_PAGE_INDEX|
-// to render the next page.
-IPC_MESSAGE_ROUTED1(PrintMsg_ContinuePreview,
-                    int /* requested_preview_page_index */)
+IPC_MESSAGE_ROUTED0(PrintMsg_ContinuePreview)
 
 // Tells a renderer to abort the print preview and reset all state.
 IPC_MESSAGE_ROUTED0(PrintMsg_AbortPreview)
@@ -264,10 +260,11 @@ IPC_MESSAGE_CONTROL1(PrintHostMsg_TempFileForPrintingWritten,
 IPC_MESSAGE_ROUTED0(PrintHostMsg_RequestPrintPreview)
 
 // Notify the browser the number of pages in the print preview document.
-IPC_MESSAGE_ROUTED3(PrintHostMsg_DidGetPreviewPageCount,
+IPC_MESSAGE_ROUTED4(PrintHostMsg_DidGetPreviewPageCount,
                     int  /* document cookie */,
                     int  /* page count */,
-                    bool /* is modifiable */)
+                    bool /* is modifiable */,
+                    bool /* clear all preview data */)
 
 // Notify the browser a print preview page has been rendered.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_DidPreviewPage,