GitLab

Previously we convert SupportedCodecs (a uint32 bit mask indicating which
codec is supported) to ContainerCodecMap (a map from a container type to a set
of supported codecs in that container). Then we pass ContainerCodecMap to
KeySystems and store it there for easy look up.

This results in a lot of duplicate converting code. This CL stores
SupportedCodecs in KeySystmeInfo and KeySystems so that we don't need to convert
anything. Then when IsTypeSupported() is called, we find the bit masks for
queried container and codec types and compare it with the SupportedCodecs stored
in KeySystems.

BUG=362769
TEST=All existing tests pass.

Review URL: https://codereview.chromium.org/246033002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266148 0039d316-1c4b-4281-b951-d872f2087c98