Add a PPB_Flash_Print interface and implement in Chrome.

chrome/renderer/pepper/ppb_pdf_impl.h

+// Copyright (c) 2012 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 CHROME_RENDERER_PEPPER_PPB_PDF_IMPL_H_
+#define CHROME_RENDERER_PEPPER_PPB_PDF_IMPL_H_
+
+#include "ppapi/c/pp_instance.h"
+
+struct PPB_PDF;
+
+class PPB_PDF_Impl {
+ public:
+  // Returns a pointer to the interface implementing PPB_PDF that is exposed
+  // to the plugin.
+  static const PPB_PDF* GetInterface();
+
+  // Invokes the "Print" command for the given instance as if the user right
+  // clicked on it and selected "Print".
+  static void InvokePrintingForInstance(PP_Instance instance);
+};
+
+#endif  // CHROME_RENDERER_PEPPER_PPB_PDF_IMPL_H_
+