[omnibox] Re-land 1530281 with slow unit test disabled.

This CL reverts commit 7e78ad7daa06966d1e195b133e83abd7bed56637 , called
"Revert "[omnibox] Load Pedal concept matching data from JSON resource""

It also disables the unit test that caused initial revert.  The test
was passing, but taking too long because of the inefficient re2-based
implementation of EraseWords.  That code was experimental, behind a
flag, and is already replaced with a technique that executes orders of
magnitude faster.  So the test will be re-enabled very soon.

Bug: 893183, 944377
Change-Id: I3e313246b2d15f4c5ab4fa3725695f2707317607
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1534193
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Orin Jaworski <orinj@chromium.org>
Auto-Submit: Orin Jaworski <orinj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643418}
15 files changed