Revert "Statically link chromium's ICU."
Revert "Statically link chromium's ICU."

Chromium has (for now) switched back to the system ICU.

This reverts commit a6faf752248131bb0b463d02eb3ba3bb7a7bc5bd.

Change-Id: I2acd58231d9ad70bc5f2b13f55e9e8199ec35375

geekboxzone/mmallow_external_chromium-libpac,geekboxzone/mmallow_external_chromium-libpac,geekboxzone/mmallow_external_chromium-libpac,geekboxzone/mmallow_external_chromium-libpac