Implement browser side of PPB_Printing resource.

content/browser/renderer_host/pepper/pepper_print_settings_manager.h

+// 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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_PRINT_SETTINGS_MANAGER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_PRINT_SETTINGS_MANAGER_H_
+
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "content/common/content_export.h"
+#include "ppapi/c/dev/pp_print_settings_dev.h"
+
+namespace content {
+
+// A class for getting the default print settings for the default printer.
+class CONTENT_EXPORT PepperPrintSettingsManager {
+ public:
+  typedef std::pair<PP_PrintSettings_Dev, int32_t> Result;
+  typedef base::Callback<void(Result)> Callback;
+
+  // The default print settings are obtained asynchronously and |callback|
+  // is called with the the print settings when they are available. |callback|
+  // will always be called on the same thread from which
+  // |GetDefaultPrintSettings| was issued.
+  virtual void GetDefaultPrintSettings(Callback callback) = 0;
+
+  virtual ~PepperPrintSettingsManager() {}
+};
+
+// Real implementation for getting the default print settings.
+class CONTENT_EXPORT PepperPrintSettingsManagerImpl
+    : public PepperPrintSettingsManager {
+ public:
+  PepperPrintSettingsManagerImpl() {}
+  virtual ~PepperPrintSettingsManagerImpl() {}
+
+  // PepperPrintSettingsManager implementation.
+  virtual void GetDefaultPrintSettings(
+      PepperPrintSettingsManager::Callback callback) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PepperPrintSettingsManagerImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_PRINT_SETTINGS_MANAGER_H_