Support for GetArchName on chromeos

telemetry/telemetry/internal/platform/cros_platform_backend.py

Index: telemetry/telemetry/internal/platform/cros_platform_backend.py
diff --git a/telemetry/telemetry/internal/platform/cros_platform_backend.py b/telemetry/telemetry/internal/platform/cros_platform_backend.py
index d20bcbcc1957638335bcf579957c64e0af96c9ca..08f03c2d2066ed5b8a0055b4003e6ece640859c3 100644
--- a/telemetry/telemetry/internal/platform/cros_platform_backend.py
+++ b/telemetry/telemetry/internal/platform/cros_platform_backend.py
@@ -4,6 +4,7 @@
 
 import logging
 
+from telemetry import decorators
 from telemetry.core import cros_interface
 from telemetry.core import platform
 from telemetry.core import util
@@ -119,6 +120,10 @@ class CrosPlatformBackend(
       sample_stats[cpu] = cstates
     return sample_stats
 
+  @decorators.Cache
+  def GetArchName(self):
+    return self._cri.GetArchName()
+
   def GetOSName(self):
     return 'chromeos'