Enable installing test CA on Android & add test for it

telemetry/telemetry/internal/util/webpagereplay_go_server.py

Index: telemetry/telemetry/internal/util/webpagereplay_go_server.py
diff --git a/telemetry/telemetry/internal/util/webpagereplay_go_server.py b/telemetry/telemetry/internal/util/webpagereplay_go_server.py
index 0879d6d840637b620cc5961b9cad4a205da67bab..a757d455168bc7b620cc5754fba4ed417b531f22 100644
--- a/telemetry/telemetry/internal/util/webpagereplay_go_server.py
+++ b/telemetry/telemetry/internal/util/webpagereplay_go_server.py
@@ -20,8 +20,12 @@ from telemetry.internal.util import binary_manager
 
 import py_utils
 
+
 _WPR_DIR = os.path.abspath(os.path.join(
     util.GetCatapultDir(), 'web_page_replay_go'))
+_WPR_KEY_FILE = os.path.join(_WPR_DIR, 'wpr_key.pem')
+_WPR_CERT_FILE = os.path.join(_WPR_DIR, 'wpr_cert.pem')
+
 
 class ReplayError(Exception):
   """Catch-all exception for the module."""
@@ -118,6 +122,8 @@ class ReplayServer(object):
     else:
       subprocess.check_call(
           [go_binary_path, 'installroot',
+           '--https_cert_file=%s' % _WPR_CERT_FILE,
+           '--https_key_file=%s' % _WPR_KEY_FILE,
            '--android_device_id=%s' % android_device_id,
            '--adb_binary_path=%s' % adb_path])
 
@@ -141,6 +147,8 @@ class ReplayServer(object):
     else:
       subprocess.check_call(
           [go_binary_path, 'removeroot',
+           '--https_cert_file=%s' % _WPR_CERT_FILE,
+           '--https_key_file=%s' % _WPR_KEY_FILE,
            '--android_device_id=%s' % android_device_id,
            '--adb_binary_path=%s' % adb_path])
 
@@ -168,14 +176,12 @@ class ReplayServer(object):
       cmd_line.append('record')
     else:
       cmd_line.append('replay')
-    key_file = os.path.join(_WPR_DIR, 'wpr_key.pem')
-    cert_file = os.path.join(_WPR_DIR, 'wpr_cert.pem')
     inject_script = os.path.join(_WPR_DIR, 'deterministic.js')
     cmd_line.extend([
         '--http_port=%s' % http_port,
         '--https_port=%s' % https_port,
-        '--https_key_file=%s' % key_file,
-        '--https_cert_file=%s' % cert_file])
+        '--https_key_file=%s' % _WPR_KEY_FILE,
+        '--https_cert_file=%s' % _WPR_CERT_FILE])
     if '--inject_scripts=' in replay_options:
       cmd_line.append('--inject_scripts=')
     else: