pdf: Create a separate component for using the pdf pepper plugin.

components/pdf/common/pdf_messages.h

Index: components/pdf/common/pdf_messages.h
diff --git a/components/pdf/common/pdf_messages.h b/components/pdf/common/pdf_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..09739237f61e1575f28f48e0715c3f03febf66ae
--- /dev/null
+++ b/components/pdf/common/pdf_messages.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.
+
+// Multiply-included file, no traditional include guard.
+#include <string.h>
+
+#include "content/public/common/common_param_traits.h"
+#include "content/public/common/common_param_traits_macros.h"
+#include "content/public/common/referrer.h"
+#include "ipc/ipc_message_macros.h"
+#include "url/gurl.h"
+
+#define IPC_MESSAGE_START PDFMsgStart
+
+// Updates the content restrictions, i.e. to disable print/copy.
+IPC_MESSAGE_ROUTED1(PDFHostMsg_PDFUpdateContentRestrictions,
+                    int /* restrictions */)
+
+// The currently displayed PDF has an unsupported feature.
+IPC_MESSAGE_ROUTED0(PDFHostMsg_PDFHasUnsupportedFeature)
+
+// Brings up SaveAs... dialog to save specified URL.
+IPC_MESSAGE_ROUTED2(PDFHostMsg_PDFSaveURLAs,
+                    GURL /* url */,
+                    content::Referrer /* referrer */)
+
+// Brings up a Password... dialog for protected documents.
+IPC_SYNC_MESSAGE_ROUTED1_1(PDFHostMsg_PDFModalPromptForPassword,
+                           std::string /* prompt */,
+                           std::string /* actual_value */)