Chrome Canary 65.3298.0

Steps to repro:
# With Chromevox on, press search+ right-bracket ']'
# Notice the pitch change and pitch percentage announcement
# Read some text with Chromevox
# Notice that the announcement of pitch percentage is spoken with a different pitch than simply reading text

Expected: The new pitch percentage announcement should be spoken with the reading voice.

Actual: The message voice is used which has a different pitch than the reading voice.