Always specify thread affinity for lazy task runner initialization

Change all usages of lazy task runners specify the thread affinity for
the task runner, since this will soon become mandatory.

Note that aggregate trait initialization syntax isn't supported by these
macros, because the preprocessor doesn't treat braces specially.

This patch has no functional changes.

[email protected]

Bug: 968047
Change-Id: I2604c5fd18fb1972ea231a3ccc1f2cfe3a5adc76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1645311
Commit-Queue: Sami Kyöstilä <[email protected]>
Reviewed-by: Gabriel Charette <[email protected]>
Cr-Commit-Position: refs/heads/master@{#669631}
25 files changed