This is required for various reasons: - Clients don't necessarily know the dimensions of the video they feed to the decoder. It's the decoder's job to figure it out from the encoded stream, but it only gets a crack at that once Decode() is called, after initialization is done. - PPAPI plugins get to call PPB_* functions at will, which means that (to avoid having to code re-entrancy into everything on the browser side) PPB_* functions aren't allowed to call into PPP_* functions. So the previous call sequence of Initialize->ProvidePictureBuffers->CreateTextures would deadlock (requiring plugins to pre-create any textures they were going to get asked for in the future). Also a bit of minor cleanup & added TODOs for future cleanup, and changed GetConfigs()' signature to match the PPAPI version of itself (return bool instead of void). BUG=none TEST=OVDATest passes on kaen. Review URL: http://codereview.chromium.org/7147006 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@89251 0039d316-1c4b-4281-b951-d872f2087c98