Proxy the PPP_Printing interface

ppapi/proxy/ppp_printing_proxy.h

Index: ppapi/proxy/ppp_printing_proxy.h
diff --git a/ppapi/proxy/ppp_printing_proxy.h b/ppapi/proxy/ppp_printing_proxy.h
new file mode 100644
index 0000000000000000000000000000000000000000..fd6375cc1348fce7f96e28ad00a37e56d9fc10d9
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+++ b/ppapi/proxy/ppp_printing_proxy.h
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+// 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 PPAPI_PROXY_PPP_PRINTING_PROXY_H_
+#define PPAPI_PROXY_PPP_PRINTING_PROXY_H_
+
+#include <vector>
+
+#include "ppapi/c/dev/ppp_printing_dev.h"
+#include "ppapi/proxy/interface_proxy.h"
+
+struct PP_PrintPageNumberRange_Dev;
+
+namespace ppapi {
+
+class HostResource;
+
+namespace proxy {
+
+class PPP_Printing_Proxy : public InterfaceProxy {
+ public:
+  PPP_Printing_Proxy(Dispatcher* dispatcher);
+  virtual ~PPP_Printing_Proxy();
+
+  static const PPP_Printing_Dev* GetProxyInterface();
+
+  // InterfaceProxy implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+
+ private:
+  // Message handlers.
+  void OnPluginMsgQuerySupportedFormats(PP_Instance instance, uint32_t* result);
+  void OnPluginMsgBegin(PP_Instance instance,
+                        const std::string& settings_string,
+                        int32_t* result);
+  void OnPluginMsgPrintPages(
+      PP_Instance instance,
+      const std::vector<PP_PrintPageNumberRange_Dev>& pages,
+      HostResource* result);
+  void OnPluginMsgEnd(PP_Instance instance);
+  void OnPluginMsgIsScalingDisabled(PP_Instance instance, bool* result);
+
+  // When this proxy is in the plugin side, this value caches the interface
+  // pointer so we don't have to retrieve it from the dispatcher each time.
+  // In the host, this value is always NULL.
+  const PPP_Printing_Dev* ppp_printing_impl_;
+
+  DISALLOW_COPY_AND_ASSIGN(PPP_Printing_Proxy);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_PPP_PRINTING_PROXY_H_
+