listen to ipc messages from plugin to perform SaveAs op

chromium_src/components/pdf/renderer/pepper_pdf_host.h

@@ -0,0 +1,52 @@
+// 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 COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
+#define COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "ppapi/host/resource_host.h"
+
+namespace content {
+class RenderFrame;
+class RendererPpapiHost;
+}
+
+namespace pdf {
+
+class PdfAccessibilityTree;
+
+class PepperPDFHost : public ppapi::host::ResourceHost {
+ public:
+  PepperPDFHost(content::RendererPpapiHost* host,
+                PP_Instance instance,
+                PP_Resource resource);
+  ~PepperPDFHost() override;
+
+  // ppapi::host::ResourceHost:
+  int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) override;
+
+ private:
+  int32_t OnHostMsgDidStartLoading(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgDidStopLoading(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgSaveAs(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgSetSelectedText(ppapi::host::HostMessageContext* context,
+                                   const base::string16& selected_text);
+  int32_t OnHostMsgSetLinkUnderCursor(ppapi::host::HostMessageContext* context,
+                                      const std::string& url);
+
+  content::RenderFrame* GetRenderFrame();
+
+  content::RendererPpapiHost* const host_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperPDFHost);
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_