Make printing work better with OOPIF. (try 2)

android_webview/renderer/aw_print_web_view_helper_delegate.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_RENDERER_AW_PRINT_WEB_VIEW_HELPER_DELEGATE_H_
 #define ANDROID_WEBVIEW_RENDERER_AW_PRINT_WEB_VIEW_HELPER_DELEGATE_H_
 
 #include "components/printing/renderer/print_web_view_helper.h"
 
 namespace android_webview {
 
 class AwPrintWebViewHelperDelegate
     : public printing::PrintWebViewHelper::Delegate {
  public:
   ~AwPrintWebViewHelperDelegate() override;
-  bool CancelPrerender(content::RenderView* render_view,
-                       int routing_id) override;
+
+ private:
+  // printing::PrintWebViewHelper::Delegate:
+  bool CancelPrerender(content::RenderFrame* render_frame) override;
   blink::WebElement GetPdfElement(blink::WebLocalFrame* frame) override;
   bool IsPrintPreviewEnabled() override;
   bool IsAskPrintSettingsEnabled() override;
   bool IsScriptedPrintEnabled() override;
   bool OverridePrint(blink::WebLocalFrame* frame) override;
-};  // class AwPrintWebViewHelperDelegate
+};
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_RENDERER_AW_PRINT_WEB_VIEW_HELPER_DELEGATE_H_