ipc: Add missing includes for USE_ATTACHMENT_BROKER.

The preprocessor variable is defined in ipc/attachment_broker.h. There were
three files that were using the variable without including the header.

BUG=535711

Review URL: https://codereview.chromium.org/1392713004

Cr-Commit-Position: refs/heads/master@{#353448}


CrOS-Libchrome-Original-Commit: 87397e0140327124f38096d1fc88190a6154a9fd
2 files changed
tree: 14a56e5f05fd8da9c05fc9ced59bcc58a37fc46e
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/