Add more control over sync for Chromium testshell.

chrome/browser/sync/profile_sync_service_android.cc

Index: chrome/browser/sync/profile_sync_service_android.cc
diff --git a/chrome/browser/sync/profile_sync_service_android.cc b/chrome/browser/sync/profile_sync_service_android.cc
index 8abc53be868b6d7e8049676a7553ca35c1f18d7c..7835d2ea3365efe3bb6b5a822407c794609a6e7f 100644
--- a/chrome/browser/sync/profile_sync_service_android.cc
+++ b/chrome/browser/sync/profile_sync_service_android.cc
@@ -472,6 +472,12 @@ ScopedJavaLocalRef<jstring> ProfileSyncServiceAndroid::GetAboutInfoForTest(
   return ConvertUTF8ToJavaString(env, about_info_json);
 }
 
+jlong ProfileSyncServiceAndroid::GetLastSyncedTimeForTest(
+    JNIEnv* env, jobject obj) {
+  return static_cast<jlong>(
+      profile_->GetPrefs()->GetInt64(prefs::kSyncLastSyncedTime));
+}
+
 void ProfileSyncServiceAndroid::NudgeSyncer(JNIEnv* env,
                                             jobject obj,
                                             jstring objectId,