Move flash clipboard to the new proxy and add custom format support

ppapi/shared_impl/flash_clipboard_format_registry.h

Index: ppapi/shared_impl/flash_clipboard_format_registry.h
diff --git a/ppapi/shared_impl/flash_clipboard_format_registry.h b/ppapi/shared_impl/flash_clipboard_format_registry.h
new file mode 100644
index 0000000000000000000000000000000000000000..90520ea81cbfa0498d0f47488e2d6ee1be941e2d
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+++ b/ppapi/shared_impl/flash_clipboard_format_registry.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_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_
+#define PPAPI_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_
+
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "ppapi/c/private/ppb_flash_clipboard.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+// This class manages custom clipboard formats that can be registered by a user
+// of PPB_Flash_Clipboard. It is used by both the plugin and host side
+// of the proxy. The host side is the definitive source of which formats
+// have been registered but format registration is tracked on the plugin
+// side to better handle error cases.
+class PPAPI_SHARED_EXPORT FlashClipboardFormatRegistry {
+ public:
+  FlashClipboardFormatRegistry();
+  ~FlashClipboardFormatRegistry();
+
+  // Registers a custom format with the given string. The ID of the format is
+  // returned if registered successfully, otherwise
+  // PP_FLASH_CLIPBOARD_FORMAT_INVALID is returned. If a format with a
+  // particular name is already registered, the ID associated with that name
+  // will be returned. The format name is checked for validity.
+  uint32_t RegisterFormat(const std::string& format_name);
+
+  // This sets the name of a particular format in the registry. This is only
+  // used on the plugin side in order to track format IDs that are returned
+  // by the host.
+  void SetRegisteredFormat(const std::string& format_name, uint32_t format);
+
+  // Checks whether the given custom format ID has been registered.
+  bool IsFormatRegistered(uint32_t format) const;
+
+  // Returns the name of a particular format.
+  std::string GetFormatName(uint32_t format) const;
+
+  // Gets the ID of a particular format name that has already been registered.
+  // PP_FLASH_CLIPBOARD_FORMAT_INVALID is returned if the format has not been
+  // registered.
+  uint32_t GetFormatID(const std::string& format_name) const;
+
+  // Returns whether the given clipboard format is a valid predefined format
+  // (i.e. one defined in the PP_Flash_Clipboard_Format enum).
+  static bool IsValidPredefinedFormat(uint32_t format);
+
+ private:
+  // A map of custom format ID to format name.
+  typedef std::map<uint32_t, std::string> FormatMap;
+  FormatMap custom_formats_;
+
+  DISALLOW_COPY_AND_ASSIGN(FlashClipboardFormatRegistry);
+};
+
+}  // ppapi
+
+#endif  // PPAPI_SHARED_IMPL_FLASH_CLIPBOARD_FORMAT_REGISTRY_H_
+