Sanitize PrefStore interface.

chrome/test/reliability/page_load_test.cc

Index: chrome/test/reliability/page_load_test.cc
diff --git a/chrome/test/reliability/page_load_test.cc b/chrome/test/reliability/page_load_test.cc
index 571c16a99875fd88ef603159c404465fee01145e..fa06d562356909475f93eef5902e62e37f0c9b23 100644
--- a/chrome/test/reliability/page_load_test.cc
+++ b/chrome/test/reliability/page_load_test.cc
@@ -50,6 +50,7 @@
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prefs/pref_service_mock_builder.h"
 #include "chrome/common/automation_messages.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
@@ -63,8 +64,8 @@
 #include "chrome/test/automation/browser_proxy.h"
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/automation/window_proxy.h"
-#include "chrome/test/ui/ui_test.h"
 #include "chrome/test/reliability/page_load_test.h"
+#include "chrome/test/ui/ui_test.h"
 #include "net/base/net_util.h"
 
 namespace {
@@ -532,12 +533,8 @@ class PageLoadTest : public UITest {
   // that was saved by the app as it closed.  The caller takes ownership of the
   // returned PrefService object.
   PrefService* GetLocalState() {
-    FilePath local_state_path = user_data_dir()
-        .Append(chrome::kLocalStateFilename);
-
-    PrefService* local_state = PrefService::CreateUserPrefService(
-        local_state_path);
-    return local_state;
+    FilePath path = user_data_dir().Append(chrome::kLocalStateFilename);
+    return PrefServiceMockBuilder().WithUserFilePrefs(path).Create();
   }
 
   void GetStabilityMetrics(NavigationMetrics* metrics) {