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Both java.gypi and apk_test.gypi expect the jar path in
input_jars_paths. This means that we were specifying the dependence in
both 'dependencies' and 'input_jars_paths'. This change makes it so that
we don't need that redundancy.

Also, make java.gypi use input_jars_paths in its input so that we
actually rebuild targets when we should.

BUG=136756


Review URL: https://chromiumcodereview.appspot.com/10837143

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150850 0039d316-1c4b-4281-b951-d872f2087c98