[Telemetry] Allow telemetry to run without adb root.

tools/telemetry/telemetry/adb_commands.py

Index: tools/telemetry/telemetry/adb_commands.py
diff --git a/tools/telemetry/telemetry/adb_commands.py b/tools/telemetry/telemetry/adb_commands.py
index 86d6bdef81666a25498e420528612ea1ded12e57..6836689c334285522f4531dcde49c3d2c058ae09 100644
--- a/tools/telemetry/telemetry/adb_commands.py
+++ b/tools/telemetry/telemetry/adb_commands.py
@@ -78,6 +78,15 @@ class AdbCommands(object):
     """
     return self._adb.RunShellCommand(command, timeout_time, log_result)
 
+  def CloseApplication(self, package):
+    """Attempt to close down the application, using increasing violence.
+
+    Args:
+      package: Name of the process to kill off, e.g.
+      com.google.android.apps.chrome
+    """
+    self._adb.CloseApplication(package)
+
   def KillAll(self, process):
     """Android version of killall, connected via adb.