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

chrome/browser/printing/print_preview_message_handler.cc

Index: chrome/browser/printing/print_preview_message_handler.cc
diff --git a/chrome/browser/printing/print_preview_message_handler.cc b/chrome/browser/printing/print_preview_message_handler.cc
index a9462e9afc2aad8b90be41785540844cd2870ca5..c9e7a5bf67be34e38496287db1b04b6bf504e6fd 100644
--- a/chrome/browser/printing/print_preview_message_handler.cc
+++ b/chrome/browser/printing/print_preview_message_handler.cc
@@ -95,6 +95,10 @@ void PrintPreviewMessageHandler::OnDidGetPreviewPageCount(
 
   PrintPreviewUI* print_preview_ui =
       static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
+
+  if (!params.is_modifiable || params.clear_preview_data)
+    print_preview_ui->ClearAllPreviewData();
+
   print_preview_ui->OnDidGetPreviewPageCount(params);
 }
 
@@ -107,10 +111,6 @@ void PrintPreviewMessageHandler::OnDidPreviewPage(
   PrintPreviewUI* print_preview_ui =
       static_cast<PrintPreviewUI*>(print_preview_tab->web_ui());
   int page_number = params.page_number;
-
-  if (page_number == FIRST_PAGE_INDEX)
-    print_preview_ui->ClearAllPreviewData();
-
   if (page_number >= FIRST_PAGE_INDEX && params.data_size) {
     RefCountedBytes* data_bytes =
         GetDataFromHandle(params.metafile_data_handle, params.data_size);
@@ -121,7 +121,7 @@ void PrintPreviewMessageHandler::OnDidPreviewPage(
   }
 }
 
-void PrintPreviewMessageHandler::OnPagesReadyForPreview(
+void PrintPreviewMessageHandler::OnMetafileReadyForPrinting(
     const PrintHostMsg_DidPreviewDocument_Params& params) {
   // Always try to stop the worker.
   StopWorker(params.document_cookie);
@@ -221,8 +221,8 @@ bool PrintPreviewMessageHandler::OnMessageReceived(
                         OnDidGetPreviewPageCount)
     IPC_MESSAGE_HANDLER(PrintHostMsg_DidPreviewPage,
                         OnDidPreviewPage)
-    IPC_MESSAGE_HANDLER(PrintHostMsg_PagesReadyForPreview,
-                        OnPagesReadyForPreview)
+    IPC_MESSAGE_HANDLER(PrintHostMsg_MetafileReadyForPrinting,
+                        OnMetafileReadyForPrinting)
     IPC_MESSAGE_HANDLER(PrintHostMsg_PrintPreviewFailed,
                         OnPrintPreviewFailed)
     IPC_MESSAGE_HANDLER(PrintHostMsg_DidGetDefaultPageLayout,