Implement Pepper PPB_VideoDecoder interface.

ppapi/api/pp_errors.idl

Index: ppapi/api/pp_errors.idl
diff --git a/ppapi/api/pp_errors.idl b/ppapi/api/pp_errors.idl
index 1e4e8706aa292c1048d361dd8ff4c7d98eca7f52..7267d3ac2d200454982e115d58595c2c529467dd 100644
--- a/ppapi/api/pp_errors.idl
+++ b/ppapi/api/pp_errors.idl
@@ -178,6 +178,15 @@
   /**
    * This value indicates that the host name could not be resolved.
    */
-  PP_ERROR_NAME_NOT_RESOLVED = -110
+  PP_ERROR_NAME_NOT_RESOLVED = -110,
+  /**
+   * This value indicates that plugin passed bad input data to the browser.

[yzshen1, 2014/05/14 18:08:23]

- Does it make sense to consider reusing existing errors?
  * PP_ERROR_UNREADABLE_INPUT -> PP_ERROR_BADARGUMENT
  * PP_ERROR_PLATFORM_FAILED -> PP_ERROR_NOTSUPPORTED or simply PP_ERROR_FAILED.
(But I am not sure what "platform failure" actually means.)

- If we decide to add these two, maybe we could consider changing the values,
say, putting them in the range of -14 ~ -19. -100~-110 are networking errors and
I think we probably want to reserve some more values starting from -111 for
future networking errors.

[bbudge, 2014/05/14 19:35:04]

I thought about both of those possibilities. PP_ERROR_BADARGUMENT to me means
something was NULL or out of range and doesn't express that a buffer of data was
malformed. (I'm changing this name to PP_ERROR_MALFORMED_INPUT).

PP_ERROR_FAILED is a little too generic to capture that there was a failure in
Chrome's implementation, and doesn't express that the failure is unrecoverable.
However I feel less strongly about this one. In the next CL I'll move these into
the empty range you suggest.

[yzshen1, 2014/05/14 22:58:16]

Okay. One thing I don't quite understand is "platform failure". Would you please
tell me more about the meaning? (And maybe add that to the comment of the error
code)

+   */
+  PP_ERROR_UNREADABLE_INPUT = -111,
+  /**
+   * This value indicates that a platform failure occurred. This indicates that
+   * the browser could not complete a valid request from the plugin.
+   */
+  PP_ERROR_PLATFORM_FAILED = -112
 };