[Android] Add a dummy host-driven test for ChromiumTestShell.

build/android/pylib/constants.py

Index: build/android/pylib/constants.py
diff --git a/build/android/pylib/constants.py b/build/android/pylib/constants.py
index e87adff2e387760b0d9ad264a0ed02d9ac42bb62..6d5d73b423c0ac03af0410f08fb22b311af3faa8 100644
--- a/build/android/pylib/constants.py
+++ b/build/android/pylib/constants.py
@@ -7,6 +7,9 @@
 import os
 
 
+CHROME_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                                          os.pardir, os.pardir, os.pardir))
+
 CHROME_PACKAGE = 'com.google.android.apps.chrome'
 CHROME_ACTIVITY = 'com.google.android.apps.chrome.Main'
 CHROME_DEVTOOLS_SOCKET = 'chrome_devtools_remote'
@@ -25,9 +28,8 @@ CHROMIUM_TEST_SHELL_PACKAGE = 'org.chromium.chrome.testshell'
 CHROMIUM_TEST_SHELL_ACTIVITY = (
     'org.chromium.chrome.testshell.ChromiumTestShellActivity')
 CHROMIUM_TEST_SHELL_DEVTOOLS_SOCKET = 'chromium_testshell_devtools_remote'
-
-CHROME_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__),
-                                          '..', '..', '..'))
+CHROMIUM_TEST_SHELL_HOST_DRIVEN_DIR = os.path.join(
+    CHROME_DIR, 'chrome', 'android')
 
 # Ports arrangement for various test servers used in Chrome for Android.
 # Lighttpd server will attempt to use 9000 as default port, if unavailable it