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This replaces PipelineStatusCB with PipelineStatusCallback in the last
places except for error_cb_, which seems like it can be called more
than once in a test.

Bug: 1007799
Change-Id: Ib60a01634267ea4f5313b8ac8f495925a6f3d989
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1993423Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Raymond Toy <rtoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748348}