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 8894c781c93eaf12b2de285d84e8d7ee3b52a91a..daa4e179a26025a33c7403a639b9cb8a2deaa0cb 100644
--- a/chrome/browser/sync/profile_sync_service_android.cc
+++ b/chrome/browser/sync/profile_sync_service_android.cc
@@ -471,6 +471,15 @@ ScopedJavaLocalRef<jstring> ProfileSyncServiceAndroid::GetAboutInfoForTest(
   return ConvertUTF8ToJavaString(env, about_info_json);
 }
 
+jlong ProfileSyncServiceAndroid::GetLastSyncedTimeForTest(
+    JNIEnv* env, jobject obj) {
+  // Use profile preferences here instead of SyncPrefs to avoid an extra
+  // conversion, since SyncPrefs::GetLastSyncedTime() converts the stored value
+  // to to base::Time.
+  return static_cast<jlong>(
+      profile_->GetPrefs()->GetInt64(prefs::kSyncLastSyncedTime));
+}
+
 void ProfileSyncServiceAndroid::NudgeSyncer(JNIEnv* env,
                                             jobject obj,
                                             jstring objectId,