[Android] Prepare build/android/ for catapult+devil.

build/android/pylib/perf/test_runner.py

Index: build/android/pylib/perf/test_runner.py
diff --git a/build/android/pylib/perf/test_runner.py b/build/android/pylib/perf/test_runner.py
index fde95edc2cff75910373bf306048a685221f452e..5482b268d47275e3eb338aff9149d5511c6c8f89 100644
--- a/build/android/pylib/perf/test_runner.py
+++ b/build/android/pylib/perf/test_runner.py
@@ -68,6 +68,7 @@ from devil.utils import cmd_helper
 from pylib import constants
 from pylib.base import base_test_result
 from pylib.base import base_test_runner
+from pylib.constants import host_paths
 
 
 # Regex for the master branch commit position.
@@ -86,7 +87,7 @@ def _GetChromiumRevision():
   # pylint: enable=line-too-long
   status, output = cmd_helper.GetCmdStatusAndOutput(
       ['git', 'log', '-n', '1', '--pretty=format:%H%n%B', 'HEAD'],
-      constants.DIR_SOURCE_ROOT)
+      host_paths.DIR_SOURCE_ROOT)
   revision = None
   commit_pos = None
   if not status:
@@ -372,9 +373,9 @@ class TestRunner(base_test_runner.BaseTestRunner):
       # Just print a heart-beat so that the outer buildbot scripts won't timeout
       # without response.
       logfile = _HeartBeatLogger()
-    cwd = os.path.abspath(constants.DIR_SOURCE_ROOT)
+    cwd = os.path.abspath(host_paths.DIR_SOURCE_ROOT)
     if full_cmd.startswith('src/'):
-      cwd = os.path.abspath(os.path.join(constants.DIR_SOURCE_ROOT, os.pardir))
+      cwd = os.path.abspath(os.path.join(host_paths.DIR_SOURCE_ROOT, os.pardir))
     try:
       exit_code, output = cmd_helper.GetCmdStatusAndOutputWithTimeout(
           full_cmd, timeout, cwd=cwd, shell=True, logfile=logfile)