Add Sparse Histogram Support to metricsPrivate

chrome/common/extensions/api/metrics_private.json

Index: chrome/common/extensions/api/metrics_private.json
diff --git a/chrome/common/extensions/api/metrics_private.json b/chrome/common/extensions/api/metrics_private.json
index d1ee679780c6f663b1b7b4b1019637febeedf596..c720217a3b227fd6327cdcfa706f3fb9cc4f7f93 100644
--- a/chrome/common/extensions/api/metrics_private.json
+++ b/chrome/common/extensions/api/metrics_private.json
@@ -148,6 +148,15 @@
         ]
       },
       {
+        "name": "recordSparseValue",
+        "type": "function",
+        "description": "Increments the count associated with |value| in the sparse histogram defined by the |metricName|",

[Ilya Sherman, 2014/03/26 22:44:14]

nit: Please end the sentence with a period.

[robliao, 2014/03/26 23:37:54]

Done.

+        "parameters": [
+          {"name": "metricName", "type": "string"},
+          {"name": "value", "type": "integer"}
+        ]
+      },
+      {
         "name": "recordValue",
         "type": "function",
         "description": "Adds a value to the given metric.",