Android: moves chrome/ to use long for JNI

Relands crrev.com/236278

BUG=317523

Review URL: https://codereview.chromium.org/80663002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236536 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236536