| Index: build/android/pylib/constants.py | 
| diff --git a/build/android/pylib/constants.py b/build/android/pylib/constants.py | 
| index a8f284b79f0b5273c48cfb0ce13060d88ea083fe..86355580b9bee1989a9d9a39ae382f54a1c345ee 100644 | 
| --- a/build/android/pylib/constants.py | 
| +++ b/build/android/pylib/constants.py | 
| @@ -131,7 +131,9 @@ ANDROID_SDK_ROOT = os.path.join(DIR_SOURCE_ROOT, | 
| ANDROID_NDK_ROOT = os.path.join(DIR_SOURCE_ROOT, | 
| 'third_party/android_tools/ndk') | 
|  | 
| -EMULATOR_SDK_ROOT = os.path.join(DIR_SOURCE_ROOT, 'android_emulator_sdk') | 
| +EMULATOR_SDK_ROOT = os.environ.get('ANDROID_EMULATOR_SDK_ROOT', | 
| +                                   os.path.join(DIR_SOURCE_ROOT, | 
| +                                                'android_emulator_sdk')) | 
|  | 
| UPSTREAM_FLAKINESS_SERVER = 'test-results.appspot.com' | 
|  | 
|  |