Expose API to store and load data usage stats from UI task runner.

components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc
index 15e70d34ae1789df6b5a65df2045fc65819a0718..6d72452e06a798a641243d46ce64e97e796e6a20 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc
@@ -15,6 +15,7 @@
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_prefs.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h"
+#include "components/data_reduction_proxy/core/browser/data_store.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_event_creator.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_event_storage_delegate_test_utils.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_event_store.h"
@@ -172,19 +173,21 @@ MockDataReductionProxyService::MockDataReductionProxyService(
     DataReductionProxySettings* settings,
     PrefService* prefs,
     net::URLRequestContextGetter* request_context,
-    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner)
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
     : DataReductionProxyService(compression_stats.Pass(),
                                 settings,
                                 prefs,
                                 request_context,
-                                io_task_runner) {
+                                make_scoped_ptr(new DataStore()).Pass(),
+                                task_runner,
+                                task_runner) {
 }
 
 MockDataReductionProxyService::~MockDataReductionProxyService() {
 }
 
 TestDataReductionProxyIOData::TestDataReductionProxyIOData(
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     scoped_ptr<DataReductionProxyConfig> config,
     scoped_ptr<DataReductionProxyEventCreator> event_creator,
     scoped_ptr<DataReductionProxyRequestOptions> request_options,
@@ -443,7 +446,7 @@ DataReductionProxyTestContext::Builder::Build() {
 }
 
 DataReductionProxyTestContext::DataReductionProxyTestContext(
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     scoped_ptr<TestingPrefServiceSimple> simple_pref_service,
     scoped_ptr<net::TestNetLog> net_log,
     scoped_refptr<net::URLRequestContextGetter> request_context_getter,
@@ -513,8 +516,11 @@ DataReductionProxyTestContext::CreateDataReductionProxyServiceInternal() {
         request_context_getter_.get(), task_runner_));
   } else {
     return make_scoped_ptr(new DataReductionProxyService(
-        compression_stats.Pass(), settings_.get(), simple_pref_service_.get(),
-        request_context_getter_.get(), task_runner_));
+                               compression_stats.Pass(), settings_.get(),
+                               simple_pref_service_.get(),
+                               request_context_getter_.get(),
+                               make_scoped_ptr(new DataStore()).Pass(),
+                               task_runner_, task_runner_)).Pass();
   }
 }