Update to newer Android Lint and suppress new Lint errors

chrome/android/java/src/org/chromium/chrome/browser/WarmupManager.java

 // Copyright 2015 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;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.os.AsyncTask;
 import android.os.StrictMode;
 import android.view.ContextThemeWrapper;
 import android.view.InflateException;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewStub;
 import android.widget.FrameLayout;
@@ skipping 19 matching lines @@
 
 /**
  * This class is a singleton that holds utilities for warming up Chrome and prerendering urls
  * without creating the Activity.
  *
  * This class is not thread-safe and must only be used on the UI thread.
  */
 public final class WarmupManager {
     private static final String TAG = "WarmupManager";
 
+    @SuppressLint("StaticFieldLeak")
     private static WarmupManager sWarmupManager;
 
     private final Set<String> mDnsRequestsInFlight;
     private final Map<String, Profile> mPendingPreconnectWithProfile;
 
     private int mToolbarContainerId;
     private ViewGroup mMainView;
     private WebContents mSpareWebContents;
 
     /**
@@ skipping 194 matching lines @@
 
     /**
      * @return Whether a spare renderer is available.
      */
     public boolean hasSpareWebContents() {
         return mSpareWebContents != null;
     }
 
     private static native void nativePreconnectUrlAndSubresources(Profile profile, String url);
 }