port c019d7f4 (r29248).

original commit message:

    Use big-boy Types to annotate interface descriptor parameters

    - Thread Type::FunctionType through stubs and the TF pipeline.
    - Augment Typer to decorate parameter nodes with types from
      a Type::FunctionType associated with interface descriptors.
    - Factor interface descriptors into platform-specific and
      platform-independent components so that all descriptors share
      a common Type::FunctionType for all platforms.

BUG=

Review URL: https://codereview.chromium.org/1210463002

Cr-Commit-Position: refs/heads/master@{#29406}