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This CL deletes all JNI registration calls under chrome/browser/ui since
the JNI registration is automatic now.

Change-Id: Id3a0bf6fe0d3bdc413e878324b732979ce0536fc
Reviewed-on: https://chromium-review.googlesource.com/572189Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Yipeng Wang <yipengw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487074}