Implement additional parts of the new ui for CBD.

chrome/browser/android/preferences/pref_service_bridge.cc

Index: chrome/browser/android/preferences/pref_service_bridge.cc
diff --git a/chrome/browser/android/preferences/pref_service_bridge.cc b/chrome/browser/android/preferences/pref_service_bridge.cc
index 7f50a0bdeca2b85fc637aabfd633a25f9fdc0fcd..5b5a92864eab7c1801721595721a9eb5e5d17c58 100644
--- a/chrome/browser/android/preferences/pref_service_bridge.cc
+++ b/chrome/browser/android/preferences/pref_service_bridge.cc
@@ -589,6 +589,21 @@ static void SetBrowsingDataDeletionTimePeriod(
                                time_period);
 }
 
+static jint GetLastClearBrowsingDataTab(JNIEnv* env,
+                                        const JavaParamRef<jobject>& obj) {
+  return GetPrefService()->GetInteger(
+      browsing_data::prefs::kLastClearBrowsingDataTab);
+}
+
+static void SetLastClearBrowsingDataTab(JNIEnv* env,
+                                        const JavaParamRef<jobject>& obj,
+                                        jint tab_index) {
+  DCHECK_GE(tab_index, 0);
+  DCHECK_LE(tab_index, 1);

[msramek, 2017/01/25 15:24:23]

nit: I would prefer <2 rather than <=1. We cannot refer to the CBD_TABS_COUNT
constant directly, but let's at least use its value, which is 2.

[dullweber, 2017/01/25 17:22:06]

Done.

+  GetPrefService()->SetInteger(browsing_data::prefs::kLastClearBrowsingDataTab,
+                               tab_index);
+}
+
 static void ClearBrowsingData(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,