[Android] Break GTest emulator launching into a separate function.

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 aa4e7dc482e73ae73da6febe95dc3f4f32f758c7..d5bd1af7cfb842ae7f35298d10f7ba4e8c3a98d1 100755
--- a/build/android/run_tests.py
+++ b/build/android/run_tests.py
@@ -55,7 +55,6 @@ from pylib import run_tests_helper
 from pylib import test_options_parser
 from pylib.base_test_sharder import BaseTestSharder
 from pylib.single_test_runner import SingleTestRunner
-from pylib.utils import time_profile
 from pylib.utils import xvfb
 
 
@@ -247,20 +246,9 @@ def _RunATestSuite(options):
   buildbot_emulators = []
 
   if options.use_emulator:
-    for n in range(options.emulator_count):
-      t = time_profile.TimeProfile('Emulator launch %d' % n)
-      avd_name = None
-      if n > 0:
-        # Creates a temporary AVD for the extra emulators.
-        avd_name = 'run_tests_avd_%d' % n
-      buildbot_emulator = emulator.Emulator(avd_name, options.fast_and_loose)
-      buildbot_emulator.Launch(kill_all_emulators=n == 0)
-      t.Stop()
-      buildbot_emulators.append(buildbot_emulator)
-      attached_devices.append(buildbot_emulator.device)
-    # Wait for all emulators to boot completed.
-    map(lambda buildbot_emulator: buildbot_emulator.ConfirmLaunch(True),
-        buildbot_emulators)
+    buildbot_emulators = emulator.LaunchEmulators(options.emulator_count,
+                             fast_and_loose=options.fast_and_loose)
+    attached_devices = [e.device for e in buildbot_emulators]
   elif options.test_device:
     attached_devices = [options.test_device]
   else: