Refactor the Java AppBannerManager to be owned by native code.

chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.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.banners;
 
 import android.app.Activity;
 import android.app.Instrumentation.ActivityMonitor;
 import android.app.Instrumentation.ActivityResult;
 import android.content.Context;
@@ skipping 154 matching lines @@
     private String mWebAppUrl;
 
     @Override
     public void startMainActivity() throws InterruptedException {
         startMainActivityOnBlankPage();
     }
 
     @Override
     protected void setUp() throws Exception {
         mPackageManager = new TestPackageManager();
-        AppBannerManager.setIsEnabledForTesting(true);
+        AppBannerManager.setIsEnabled(true);
         AppBannerInfoBarDelegateAndroid.setPackageManagerForTesting(mPackageManager);
         ShortcutHelper.setDelegateForTests(new ShortcutHelper.Delegate() {
             @Override
             public void sendBroadcast(Context context, Intent intent) {
                 // Ignore to prevent adding homescreen shortcuts.
             }
         });
 
         super.setUp();
 
@@ skipping 345 matching lines @@
             }
         });
 
         // Test that bitmap sizes match expectations.
         int idealSize = getActivity().getResources().getDimensionPixelSize(
                 R.dimen.webapp_splash_image_size_ideal);
         assertEquals(idealSize, dataStorageFactory.mSplashImage.getWidth());
         assertEquals(idealSize, dataStorageFactory.mSplashImage.getHeight());
     }
 }