[Android] Move modules_unittest to isolate.

Also:
 - Do some cleanup
 - Move isolate remap dir to src/ and clean up during test tear down

NOTRY=True
BUG=249870, 260332
R=craigdh@chromium.org, hellner@chromium.org

Review URL: https://codereview.chromium.org/19220004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211756 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: dc735b5aa07bdda64399cbc822d39bcc75527c01
diff --git a/build/android/pylib/constants.py b/build/android/pylib/constants.py
index c3ec825..681853e 100644
--- a/build/android/pylib/constants.py
+++ b/build/android/pylib/constants.py
@@ -11,6 +11,7 @@
 
 DIR_SOURCE_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                                os.pardir, os.pardir, os.pardir))
+ISOLATE_DEPS_DIR = os.path.join(DIR_SOURCE_ROOT, 'isolate_deps_dir')
 EMULATOR_SDK_ROOT = os.path.abspath(os.path.join(DIR_SOURCE_ROOT, os.pardir,
                                                  os.pardir))