Fix compile optimization in analyze.py in Android trybots.

scripts/slave/recipes/android/tester.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 DEPS = [
     'adb',
     'bot_update',
     'chromium',
     'chromium_android',
     'filter',
@@ skipping 128 matching lines @@
 
     compile_targets = api.chromium.c.compile_py.default_targets
     api.filter.does_patch_require_compile(
         exes=test_names,
         compile_targets=compile_targets,
         additional_name='chromium',
         config_file_name='trybot_analyze_config.json')
     if not api.filter.result:
       return
     compile_targets = list(set(compile_targets) &
-                                 set(api.filter.compile_targets))
+                                 set(api.filter.compile_targets)) if \
+        compile_targets else api.filter.compile_targets
     instrumentation_tests = [i for i in instrumentation_tests if \
         i['gyp_target'] in api.filter.matching_exes]
     unittests = [i for i in unittests if i[0] in api.filter.matching_exes]
 
   api.chromium_android.run_tree_truth()
   api.chromium_android.compile(targets=compile_targets)
 
   api.adb.root_devices()
 
   api.chromium_android.spawn_logcat_monitor()
@@ skipping 55 matching lines @@
   yield (
       api.test('no_compile_because_of_analyze') +
       api.properties.generic(
           mastername='tryserver.chromium.linux',
           buildername='android_dbg_tests_recipe',
           slavename='slavename') +
       api.override_step_data(
           'analyze',
           api.json.output({'status': 'No compile necessary'}))
   )