[Polymer] update polymer

chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheBootReceiver.java

Index: chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheBootReceiver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheBootReceiver.java b/chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheBootReceiver.java
deleted file mode 100644
index fedccba6c5d789ed9736bc540bb63c8dd682ce1f..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheBootReceiver.java
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chrome.browser.precache;
-
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-
-import org.chromium.base.Log;
-
-/**
- * Receives a boot signal to reschedule precaching.
- */
-public class PrecacheBootReceiver extends BroadcastReceiver {
-    private static final String TAG = "Precache";
-
-    @Override
-    public void onReceive(Context context, Intent intent) {
-        Log.v(TAG, "received boot signal");
-        PrecacheController.schedulePeriodicPrecacheTask(context);
-    }
-}