Rename the shared_impl resource files to give them more regular names.

ppapi/shared_impl/char_set_impl.h

-// Copyright (c) 2011 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_CHAR_SET_IMPL_H_
-#define PPAPI_SHARED_IMPL_CHAR_SET_IMPL_H_
-
-#include "base/basictypes.h"
-#include "ppapi/c/dev/ppb_char_set_dev.h"
-#include "ppapi/shared_impl/ppapi_shared_export.h"
-
-namespace ppapi {
-
-// Contains the implementation of character set conversion that is shared
-// between the proxy and the renderer.
-class PPAPI_SHARED_EXPORT CharSetImpl {
- public:
-  static char* UTF16ToCharSet(const uint16_t* utf16,
-                              uint32_t utf16_len,
-                              const char* output_char_set,
-                              PP_CharSet_ConversionError on_error,
-                              uint32_t* output_length);
-
-  static uint16_t* CharSetToUTF16(const char* input,
-                                  uint32_t input_len,
-                                  const char* input_char_set,
-                                  PP_CharSet_ConversionError on_error,
-                                  uint32_t* output_length);
-};
-
-}  // namespace ppapi
-
-#endif  // PPAPI_SHARED_IMPL_CHAR_SET_IMPL_H_