Run PPB_CharSet_Dev logic directly in the plugin process.

Run PPB_CharSet_Dev logic directly in the plugin process.

- Move part of the character set conversion logic into ppapi/shared_impl/char_set_impl.{h,cc}.
- Change ppb_char_set_proxy to use it directly in the plugin process.
- Another minor change is to avoid using malloc/free during character set conversion, and use PPB_Core.MemAlloc/MemFree instead.

BUG=none
TEST=Pass test_char_set.{h,cc}

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=78232

[yzshen1, 2011-03-15 16:42:33]

Hi, Brett.

Please review. Thanks!

[brettw, 2011-03-15 16:57:44]

LGTM