Cleanup: Remove MD5_CTX typedef.

Instead just use MD5Context type directly. In C++ it is unnecessary to
alias the types using typedef, unline C (where if you don't you have to
spell out struct or enum infront of the user-type everytime you want to make a
variable).

So since WebRTC's base API is C++, it seems unnecessay to keep this
typedef around.

BUG=None
TEST=rtc_unittests --gtest_filter=Md5*
R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/46799004

Patch from Thiago Farina <tfarina@chromium.org>.

Cr-Commit-Position: refs/heads/master@{#8916}
2 files changed