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This change removes the top level android directory from dom_distiller
and splits it into content/browser/android and core/android. The two
directories now each have their own JNI registrar that allows them to
depend on appropriate parts of the component.

BUG=562769
TBR=yfriedman@chromium.org

Review-Url: https://codereview.chromium.org/2252963004
Cr-Commit-Position: refs/heads/master@{#415400}