Change DataReductionProxy browser_tests to use dataReductionProxy API.

chrome/test/data/extensions/api_test/preference/data_reduction_proxy/test.js

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Content settings API test
 // Run with browser_tests --gtest_filter=ExtensionApiTest.DataReductionProxy
 
 var dataReductionProxy = chrome.dataReductionProxy;
 var privatePreferences = chrome.preferencesPrivate;
 chrome.test.runTests([
   function getDrpPrefs() {
     dataReductionProxy.spdyProxyEnabled.get({}, chrome.test.callbackPass(
         function(result) {
           chrome.test.assertEq(
               {
                 'value': false,
                 'levelOfControl': 'controllable_by_this_extension'
               },
               result);
     }));
-    privatePreferences.dataReductionDailyContentLength.get({},
+    dataReductionProxy.dataReductionDailyContentLength.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
-                'value': []
+                'value': [],
+                'levelOfControl': 'controllable_by_this_extension'
               },
               result);
     }));
-    privatePreferences.dataReductionDailyReceivedLength.get({},
+    dataReductionProxy.dataReductionDailyReceivedLength.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
-                'value': []
+                'value': [],
+                'levelOfControl': 'controllable_by_this_extension'
               },
               result);
     }));
     privatePreferences.dataReductionUpdateDailyLengths.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
                 'value': false
               },
               result);
     }));
   },
   function updateDailyLengths() {
-    privatePreferences.dataReductionDailyContentLength.onChange.addListener(
+    dataReductionProxy.dataReductionDailyContentLength.onChange.addListener(
         confirmDailyContentLength);
-    privatePreferences.dataReductionDailyReceivedLength.onChange.addListener(
+    dataReductionProxy.dataReductionDailyReceivedLength.onChange.addListener(
         confirmRecievedLength);
 
     // Trigger calls to confirmDailyContentLength.onChange and
     // dataReductionDailyReceivedLength.onChange listeners.
     dataReductionProxy.spdyProxyEnabled.set({ 'value': true });
     privatePreferences.dataReductionUpdateDailyLengths.set({'value': true});
 
     // Helper methods.
     var expectedDailyLengths = [];
     for (var i = 0; i < 60; i++) {
       expectedDailyLengths[i] = '0';
     }
     function confirmRecievedLength() {
-      privatePreferences.dataReductionDailyReceivedLength.get({},
+      dataReductionProxy.dataReductionDailyReceivedLength.get({},
           chrome.test.callbackPass(function(result) {
             chrome.test.assertEq(
                 {
-                  'value': expectedDailyLengths
+                  'value': expectedDailyLengths ,
+                  'levelOfControl': 'controllable_by_this_extension'
                 },
                 result);
       }));
       privatePreferences.dataReductionUpdateDailyLengths.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
                 'value': false
               },
               result);
       }));
     }
     function confirmDailyContentLength() {
-      privatePreferences.dataReductionDailyContentLength.get({},
+      dataReductionProxy.dataReductionDailyContentLength.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
-                'value': expectedDailyLengths
+                'value': expectedDailyLengths ,
+                'levelOfControl': 'controllable_by_this_extension'
               },
               result);
       }));
       privatePreferences.dataReductionUpdateDailyLengths.get({},
         chrome.test.callbackPass(function(result) {
           chrome.test.assertEq(
               {
                 'value': false
               },
               result);
       }));
     }
   }
 ]);