Reland of ppapi: PPB_VpnProvider: Implement Resource Host

content/browser/renderer_host/pepper/pepper_vpn_provider_message_filter_chromeos.h

Index: content/browser/renderer_host/pepper/pepper_vpn_provider_message_filter_chromeos.h
diff --git a/content/browser/renderer_host/pepper/pepper_vpn_provider_message_filter_chromeos.h b/content/browser/renderer_host/pepper/pepper_vpn_provider_message_filter_chromeos.h
new file mode 100644
index 0000000000000000000000000000000000000000..2170b334f9b7aafe1c5b4512e94f0b0d31036b89
--- /dev/null
+++ b/content/browser/renderer_host/pepper/pepper_vpn_provider_message_filter_chromeos.h
@@ -0,0 +1,116 @@
+// Copyright 2016 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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_VPN_PROVIDER_MESSAGE_FILTER_CHROMEOS_H_
+#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_VPN_PROVIDER_MESSAGE_FILTER_CHROMEOS_H_
+
+#include <stdint.h>
+
+#include <memory>
+#include <queue>
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "base/task_runner.h"
+#include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/vpn_service_proxy.h"
+#include "ipc/ipc_message.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/ppb_vpn_provider.h"
+#include "ppapi/host/host_message_context.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/host/resource_message_filter.h"
+#include "ppapi/shared_impl/vpn_provider_util.h"
+#include "url/gurl.h"
+
+namespace content {
+class BrowserContext;
+
+// The host for PPB_VpnProvider.
+// Important: The PPB_VpnProvider API is available only on Chrome OS.
+class CONTENT_EXPORT PepperVpnProviderMessageFilter
+    : public ppapi::host::ResourceMessageFilter {
+ public:
+  PepperVpnProviderMessageFilter(BrowserPpapiHostImpl* host,
+                                 PP_Instance instance);
+
+  // ppapi::host::ResourceMessageFilter overrides.
+  scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
+      const IPC::Message& message) override;
+  int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) override;
+
+  // PepperVpnProviderResourceHostProxyImpl entry points.
+  void SendOnPacketReceived(const std::vector<char>& packet);
+  void SendOnUnbind();
+
+ private:
+  using SuccessCallback = base::Closure;
+  using FailureCallback =
+      base::Callback<void(const std::string& error_name,
+                          const std::string& error_message)>;
+  ~PepperVpnProviderMessageFilter() override;
+
+  // Message handlers
+  int32_t OnBind(ppapi::host::HostMessageContext* context,
+                 const std::string& configuration_id,
+                 const std::string& configuration_name);
+  int32_t OnSendPacket(ppapi::host::HostMessageContext* context,
+                       uint32_t packet_size,
+                       uint32_t id);
+  int32_t OnPacketReceivedReply(ppapi::host::HostMessageContext* context,
+                                uint32_t id);
+  // OnBind helpers
+  int32_t DoBind(SuccessCallback success_callback,
+                 FailureCallback failure_callback);
+  void OnBindSuccess(const ppapi::host::ReplyMessageContext& context);
+  void OnBindFailure(const ppapi::host::ReplyMessageContext& context,
+                     const std::string& error_name,
+                     const std::string& error_message);
+  void OnBindReply(const ppapi::host::ReplyMessageContext& context,
+                   int32_t reply);
+
+  // OnSendPacket helpers
+  int32_t DoSendPacket(const std::vector<char>& packet,
+                       SuccessCallback success_callback,
+                       FailureCallback failure_callback);
+  void OnSendPacketSuccess(const ppapi::host::ReplyMessageContext& context,
+                           uint32_t id);
+  void OnSendPacketFailure(const ppapi::host::ReplyMessageContext& context,
+                           uint32_t id,
+                           const std::string& error_name,
+                           const std::string& error_message);
+  void OnSendPacketReply(const ppapi::host::ReplyMessageContext& context,
+                         uint32_t id);
+
+  // OnPacketReceived helper
+  void DoPacketReceived(const std::vector<char>& packet, uint32_t id);
+
+  GURL document_url_;
+  std::string configuration_id_;
+  std::string configuration_name_;
+
+  BrowserContext* browser_context_;
+  std::unique_ptr<VpnServiceProxy> vpn_service_proxy_;
+
+  bool bound_;
+  std::unique_ptr<ppapi::VpnProviderSharedBuffer> send_packet_buffer_;
+  std::unique_ptr<ppapi::VpnProviderSharedBuffer> recv_packet_buffer_;
+
+  std::queue<std::vector<char>> received_packets_;
+
+  base::WeakPtrFactory<PepperVpnProviderMessageFilter> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperVpnProviderMessageFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_VPN_PROVIDER_MESSAGE_FILTER_CHROMEOS_H_