Android / Telemetry: make surface_stats_collector more robust.

build/android/surface_stats.py

Index: build/android/surface_stats.py
diff --git a/build/android/surface_stats.py b/build/android/surface_stats.py
index 9cff25c04cc761ef8590a98b3f1e6a2e93253a20..f023c0292dc69d14774d3b1da6bd09139184ff8d 100755
--- a/build/android/surface_stats.py
+++ b/build/android/surface_stats.py
@@ -29,7 +29,7 @@ _FIELD_FORMAT = {
 def _MergeResults(results, fields):
   merged_results = collections.defaultdict(list)
   for result in results:
-    if fields != ['all'] and not result.name in fields:
+    if (fields != ['all'] and not result.name in fields) or not result.value:

[Sami, 2013/06/05 15:27:25]

The last part should be "or result.value is None" since 0 is a valid value for
some of the metrics :)

[bulach, 2013/06/05 15:38:01]

Done.

       continue
     name = '%s (%s)' % (result.name, result.unit)
     if isinstance(result.value, list):