Initial support for cloudprint in print preview

chrome/renderer/print_web_view_helper.h

Index: chrome/renderer/print_web_view_helper.h
diff --git a/chrome/renderer/print_web_view_helper.h b/chrome/renderer/print_web_view_helper.h
index ed9c8e221fb84844f5cb297e7e47bd83401451f7..3e5c69cdba34dbbe6585aa9a469bcb7176dc619a 100644
--- a/chrome/renderer/print_web_view_helper.h
+++ b/chrome/renderer/print_web_view_helper.h
@@ -6,6 +6,8 @@
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #pragma once
 
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/time.h"
@@ -77,7 +79,6 @@ class PrintWebViewHelper : public RenderViewObserver ,
  protected:
   // WebKit::WebViewClient override:
   virtual void didStopLoading();
-
  private:
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
                            BlockScriptInitiatedPrinting);
@@ -100,6 +101,11 @@ class PrintWebViewHelper : public RenderViewObserver ,
 
   // Message handlers ---------------------------------------------------------
 
+  // Setup or teardown a whitelist allowing the
+  // print preview page to communicate with cloud print.
+  void OnPrintSetupWhitelist(std::string host);
+  void OnPrintTeardownWhitelist(std::string host);
+
   // Print the document.
   void OnPrintPages();