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Built a special EG2 host app target with the test application delegate.
Adapted chrome_test_case test filtering logic to EG2.
Created the EG2 suite.

Bug: 1093981
Change-Id: Ie210dd9ad55c1e3cda57ef25e43c4f0bd7d35277
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2243583Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#778906}