Whitelist data savings prefs for the reduction proxy.

chrome/common/extensions/api/preferences_private.json

Index: chrome/common/extensions/api/preferences_private.json
diff --git a/chrome/common/extensions/api/preferences_private.json b/chrome/common/extensions/api/preferences_private.json
index 6babb2c67ee59e711381535561e2665a65a3fd62..c04647606684c53d30bb7aadbca3a0195d1b0ec3 100644
--- a/chrome/common/extensions/api/preferences_private.json
+++ b/chrome/common/extensions/api/preferences_private.json
@@ -18,6 +18,24 @@
         "$ref": "types.private.ChromeDirectSetting",
         "value": ["spdy_proxy.enabled", {"type":"boolean"}],
         "description": "Flag to enable data usage reduction by sending requests via data reduction proxy. This preference's value is a boolean, defaulting to <code>false</code>."
+      },
+      "dataReductionDailyContentLength": {
+        "nocompile": true,
+        "$ref": "types.private.ChromeDirectSetting",
+        "value": ["data_reduction.daily_original_length", {"type":"array"}],
+        "description": "Each item contains the number uncompressed bytes through data reduction proxy per day."
+      },
+      "dataReductionDailyReceivedLength": {
+        "nocompile": true,
+        "$ref": "types.private.ChromeDirectSetting",
+        "value": ["data_reduction.daily_received_length", {"type":"array"}],
+        "description": "Each item contains the number of compressed bytes through data reduction proxy per day."
+      },
+      "dataReductionUpdateDailyLengths": {
+        "nocompile": true,
+        "$ref": "types.private.ChromeDirectSetting",
+        "value": ["data_reduction.update_daily_lengths", {"type":"boolean"}],
+        "description": "Flag to indicate that dataReductionDailyContentLength and dataReductionDailyReceivedLength must be updated with their latest values. This preference's value is a boolean, defaulting to <code>false</code>."
       }
     },
     "functions": [