Rename InProgressFrameEncode to be unique (media/cast)

When building using jumbo, files get merged and functions
with the same name may end up in the same namespace. This
happens with the functions InProgressFrameEncode defined in:
media/cast/sender/external_video_encoder.cc
media/cast/sender/h264_vt_encoder.cc

This commit solves the issue by renaming the functions
to something more file specific.

Bug: 86750
Change-Id: I8f6fb84783539dcec4aae824bb971e982b4db5c2
Reviewed-on: https://chromium-review.googlesource.com/1152745
Commit-Queue: Chrome Cunningham (In Paris) <chcunningham@chromium.org>
Reviewed-by: Chrome Cunningham (In Paris) <chcunningham@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578594}
2 files changed