Remove the context argument from all WebappRegistry/WebappDataStorage methods.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java

 // 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.webapps;
 
 import android.content.Intent;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.library_loader.LibraryProcessType;
@@ skipping 33 matching lines @@
             getActivityTab().loadUrl(
                     new LoadUrlParams(overrideUrl, PageTransition.AUTO_TOPLEVEL));
         }
     }
 
     @Override
     protected void onStorageIsNull(final int backgroundColor) {
         // Register the WebAPK. It is possible that a WebAPK's meta data was deleted when user
         // cleared Chrome's data. When it is launched again, we know that the WebAPK is still
         // installed, so re-register it.
-        WebappRegistry.registerWebapp(WebApkActivity.this, mWebappInfo.id(),
-                new WebappRegistry.FetchWebappDataStorageCallback() {
+        WebappRegistry.registerWebapp(
+                mWebappInfo.id(), new WebappRegistry.FetchWebappDataStorageCallback() {
                     @Override
                     public void onWebappDataStorageRetrieved(WebappDataStorage storage) {
                         updateStorage(storage);
                         // Initialize the update related timestamps to the registration time.
                         storage.updateTimeOfLastCheckForUpdatedWebManifest();
                         storage.updateTimeOfLastWebApkUpdateRequestCompletion();
                         // The downloading of the splash screen image happens before a WebAPK's
                         // package name is available. If we want to use the image in the first
                         // launch, we need to cache the image, register the WebAPK and store the
                         // image in the SharedPreference when the WebAPK is installed
@@ skipping 98 matching lines @@
     }
 
     @Override
     protected void onDestroyInternal() {
         if (mUpdateManager != null) {
             mUpdateManager.destroy();
         }
         super.onDestroyInternal();
     }
 }