Fix a typo in video_VideoDecodeMemoryUsage.

BUG=None
TEST=Run the test on parrot

Change-Id: Ie5e45111fe61074ed0d65aa267511d5c7c19b850
Reviewed-on: https://chromium-review.googlesource.com/177433
Reviewed-by: Owen Lin <owenlin@chromium.org>
Commit-Queue: Owen Lin <owenlin@chromium.org>
Tested-by: Owen Lin <owenlin@chromium.org>
diff --git a/client/site_tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py b/client/site_tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py
index 9efd58f..dc089f2 100644
--- a/client/site_tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py
+++ b/client/site_tests/video_VideoDecodeMemoryUsage/video_VideoDecodeMemoryUsage.py
@@ -103,7 +103,7 @@
             result = GEM_OBJECTS_RE.match(line)
             if result:
                 return int(result.group(2))
-    raise eror.TestError('Cannot parse the content')
+    raise error.TestError('Cannot parse the content')
 
 
 def _get_linear_regression_slope(x, y):