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 36444289875f418cdb16feced7158cf6f5ad7130..f5f0d5d2288580ad027170c6412cfb5e0c08a3de 100644
--- a/chrome/common/print_messages.h
+++ b/chrome/common/print_messages.h
@@ -129,6 +129,9 @@ IPC_STRUCT_BEGIN(PrintHostMsg_DidGetPreviewPageCount_Params)
 
   // The id of the preview request.
   IPC_STRUCT_MEMBER(int, preview_request_id)
+
+  // Indicates whether the existing preview data needs to be cleared or not.
+  IPC_STRUCT_MEMBER(bool, clear_preview_data)
 IPC_STRUCT_END()
 
 // Parameters to describe a rendered page.
@@ -209,11 +212,7 @@ 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)
@@ -291,7 +290,7 @@ IPC_MESSAGE_ROUTED1(PrintHostMsg_DidPreviewPage,
 // Sends back to the browser the complete rendered document for print preview
 // that was requested by a PrintMsg_PrintPreview message. The memory handle in
 // this message is already valid in the browser process.
-IPC_MESSAGE_ROUTED1(PrintHostMsg_PagesReadyForPreview,
+IPC_MESSAGE_ROUTED1(PrintHostMsg_MetafileReadyForPrinting,
                     PrintHostMsg_DidPreviewDocument_Params /* params */)
 
 // Tell the browser printing failed.