Add missing dependencies to extensions BUILD.gns
Some files from guest_view include (not directly) file
extensions/common/api/events.h which is generated by target
//extensions/common/api. This dependency is missing and
sometimes it causes compilation errors. Build will fail if
no target which depends on //extensions/common/api is built
before guest_view. It happens quite rarely: it failed once
on ~10 rebuilds on my mac.
BUG=
Review-Url: https://codereview.chromium.org/2402453002
Cr-Commit-Position: refs/heads/master@{#423613}
3 files changed
