Fix print preview workflow to reflect settings of selected printer.

chrome/renderer/mock_printer.cc

Index: chrome/renderer/mock_printer.cc
diff --git a/chrome/renderer/mock_printer.cc b/chrome/renderer/mock_printer.cc
index 9a5d2f44eeb4164068243395a05df74402869c51..d4e5f1d1d635c26703307a5f16e5c4cb7d323870 100644
--- a/chrome/renderer/mock_printer.cc
+++ b/chrome/renderer/mock_printer.cc
@@ -123,8 +123,6 @@ void MockPrinter::ScriptedPrint(int cookie,
 void MockPrinter::UpdateSettings(int cookie,
                                  PrintMsg_PrintPages_Params* params,
                                  const std::vector<int>& pages) {
-  EXPECT_EQ(document_cookie_, cookie);

[Lei Zhang, 2011/09/21 03:56:04]

Since UpdateSettings() is effectively the new InitPrintSettings() for print
preview, you should create a new |document_cookie_| if |cookie| is invalid.

[arthurhsu, 2011/09/22 00:01:26]

Done.

-
   params->Reset();
   params->pages = pages;
   SetPrintParams(&(params->params));