Default to apk tests in run_tests.py

build/android/run_tests.py

Index: build/android/run_tests.py
diff --git a/build/android/run_tests.py b/build/android/run_tests.py
index 928bc2fac4855ef518e737e9ca7a7e0b0b90e2a7..ac7164444695f00eb37a83d9792ffd985bb212a6 100755
--- a/build/android/run_tests.py
+++ b/build/android/run_tests.py
@@ -453,9 +453,8 @@ def main(argv):
   option_parser.add_option('--annotate', default=True,
                            help='Print buildbot-style annotate messages '
                            'for each test suite.  Default=True')
-  option_parser.add_option('--apk', default=False,
-                           help='Use the apk test runner '
-                           '(off by default for now)')
+  option_parser.add_option('--apk', default=True,
+                           help='Use the apk test runner by default')
   options, args = option_parser.parse_args(argv)
   if len(args) > 1:
     print 'Unknown argument:', args[1:]