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diff --git a/components/pdf/renderer/ppb_pdf_impl.h b/components/pdf/renderer/ppb_pdf_impl.h
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+++ b/components/pdf/renderer/ppb_pdf_impl.h
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+// Copyright 2014 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 COMPONENT_PDF_RENDERER_PPB_PDF_IMPL_H_
+#define COMPONENT_PDF_RENDERER_PPB_PDF_IMPL_H_
+
+#include "ppapi/c/pp_instance.h"
+
+struct PPB_PDF;
+
+namespace pdf {
+
+class PPB_PDF_Impl {
+ public:
+  class PrintClient {
+   public:
+    virtual ~PrintClient() {}
+
+    // Returns whether printing is enabled for the plugin instance identified by
+    // |instance_id|.
+    virtual bool IsPrintingEnabled(PP_Instance instance_id) = 0;
+
+    // Invokes the "Print" command for the plugin instance identified by
+    // |instance_id|.
+    virtual void Print(PP_Instance instance_id) = 0;
+  };
+
+  // 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);
+
+  // The caller retains the ownership of |print_client|. The client is
+  // allowed to be set only once, and when set, the client must outlive the
+  // PPB_PDF_Impl instance.
+  static void SetPrintClient(PrintClient* print_client);
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENT_PDF_RENDERER_PPB_PDF_IMPL_H_