[omnibox] Add a flag for changing display color of navigation suggestions.

This CL adds two chrome://flags flags for crrev.com/c/1475065.

Bug: 931836
Change-Id: I513f988e36c853383c41f48b1ed0841a5ca10b60
Reviewed-on: https://chromium-review.googlesource.com/c/1481904
Reviewed-by: Elly Fong-Jones <[email protected]>
Reviewed-by: Kevin Bailey <[email protected]>
Commit-Queue: manuk hovanesian <[email protected]>
Cr-Commit-Position: refs/heads/master@{#634712}
5 files changed