Add a printing resource (as a new style resource) to fetch the default print settings

ppapi/proxy/printing_resource.h

Index: ppapi/proxy/printing_resource.h
diff --git a/ppapi/proxy/printing_resource.h b/ppapi/proxy/printing_resource.h
new file mode 100644
index 0000000000000000000000000000000000000000..d99b4594cf5e3bd10b6b3788531bf7652d68e4b5
--- /dev/null
+++ b/ppapi/proxy/printing_resource.h
@@ -0,0 +1,52 @@
+// 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_PRINTING_RESOURCE_H_
+#define PPAPI_PROXY_PRINTING_RESOURCE_H_
+
+#include "ppapi/proxy/connection.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/ppb_printing_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class PPAPI_PROXY_EXPORT PrintingResource
+    : public PluginResource,
+      public NON_EXPORTED_BASE(thunk::PPB_Printing_API) {
+ public:
+  PrintingResource(Connection connection,
+                   PP_Instance instance);
+  virtual ~PrintingResource();
+
+  // Resource overrides.
+  virtual thunk::PPB_Printing_API* AsPPB_Printing_API() OVERRIDE;
+
+  // PPB_Printing_API.
+  virtual int32_t GetDefaultPrintSettings(
+      PP_PrintSettings_Dev* print_settings,
+      scoped_refptr<TrackedCallback> callback) OVERRIDE;
+
+ private:
+  // PluginResource override.
+  virtual void OnReplyReceived(const ResourceMessageReplyParams& params,
+                               const IPC::Message& msg) OVERRIDE;
+
+  void OnPluginMsgGetDefaultPrintSettingsReply(
+      const ResourceMessageReplyParams& params,
+      const PP_PrintSettings_Dev& print_settings);
+
+  PP_PrintSettings_Dev* print_settings_;
+
+  scoped_refptr<TrackedCallback> callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrintingResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_PRINTING_RESOURCE_H_