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This adds three hardcoded URLs as part of the chrome://safe-browsing/
domain:

 * chrome://safe-browsing/match?type=malware
 * chrome://safe-browsing/match?type=phishing
 * chrome://safe-browsing/match?type=unwanted

These URLs will be needed by WebView for CTS testing the various Safe
Browsing APIs.

Bug: 709626
Test: browser_tests --gtest_filter=SafeBrowsingBlockingPage*HardcodedUrls*
Change-Id: I56d6557e6474feda6b036f04aa39a8ad92dcc4d1
Reviewed-on: https://chromium-review.googlesource.com/572765Reviewed-by: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487305}