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This CL adds new typography contexts to ChromeTypography to be
in the Sharesheet. This allows us to align typography with the
mocks, linked in the bug.

Bug: 1141744
Change-Id: Ic15e6f068d62919f71a7d5f89ac5e4ad6fe61fd8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2525382Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834419}