fix emulator.py by using Android SDK in third_party/android_tools instead of downloading adt

build/android/pylib/constants/__init__.py

 # Copyright (c) 2012 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.
 
 """Defines a set of constants shared by test runners and other scripts."""
 
 # TODO(jbudorick): Split these constants into coherent modules.
 
 # pylint: disable=W0212
 
@@ skipping 149 matching lines @@
 ANDROID_SDK_ROOT = os.path.join(DIR_SOURCE_ROOT,
                                 'third_party', 'android_tools', 'sdk')
 ANDROID_SDK_TOOLS = os.path.join(ANDROID_SDK_ROOT,
                                  'build-tools', ANDROID_SDK_BUILD_TOOLS_VERSION)
 ANDROID_NDK_ROOT = os.path.join(DIR_SOURCE_ROOT,
                                 'third_party', 'android_tools', 'ndk')
 
 PROGUARD_SCRIPT_PATH = os.path.join(
     ANDROID_SDK_ROOT, 'tools', 'proguard', 'bin', 'proguard.sh')
 
-EMULATOR_SDK_ROOT = os.environ.get('ANDROID_EMULATOR_SDK_ROOT',
-                                   os.path.join(DIR_SOURCE_ROOT,
-                                                'android_emulator_sdk'))
-
 PROGUARD_ROOT = os.path.join(DIR_SOURCE_ROOT, 'third_party', 'proguard')
 
 BAD_DEVICES_JSON = os.path.join(DIR_SOURCE_ROOT,
                                 os.environ.get('CHROMIUM_OUT_DIR', 'out'),
                                 'bad_devices.json')
 
 UPSTREAM_FLAKINESS_SERVER = 'test-results.appspot.com'
 
 # TODO(jbudorick): Remove once unused.
 DEVICE_LOCAL_PROPERTIES_PATH = '/data/local.prop'
@@ skipping 95 matching lines @@
       subprocess.call(['adb', 'version'], stdout=devnull, stderr=devnull)
     return 'adb'
   except OSError:
     logging.debug('No adb found in $PATH, fallback to checked in binary.')
     return os.path.join(ANDROID_SDK_ROOT, 'platform-tools', 'adb')
 
 # Exit codes
 ERROR_EXIT_CODE = 1
 INFRA_EXIT_CODE = 87
 WARNING_EXIT_CODE = 88