Reland "Android: Remove GetApplicationContext part 2"

chrome/android/java/src/org/chromium/chrome/browser/BackgroundSyncLauncher.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.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.StrictMode;
@@ skipping 37 matching lines @@
      * Automatic GCM use is disabled by tests, and also by this class if it is determined on
      * creation that the installed Play Services library is out of date.
      */
     private static boolean sGCMEnabled = true;
 
     @VisibleForTesting
     protected AsyncTask<Void, Void, Void> mLaunchBrowserIfStoppedTask;
 
     /**
      * Create a BackgroundSyncLauncher object, which is owned by C++.
-     * @param context The app context.
      */
     @VisibleForTesting
     @CalledByNative
-    protected static BackgroundSyncLauncher create(Context context) {
+    protected static BackgroundSyncLauncher create() {
         if (sInstance != null) {
             throw new IllegalStateException("Already instantiated");
         }
 
-        sInstance = new BackgroundSyncLauncher(context);
+        sInstance = new BackgroundSyncLauncher();
         return sInstance;
     }
 
     /**
      * Called when the C++ counterpart is deleted.
      */
     @VisibleForTesting
     @CalledByNative
     protected void destroy() {
         assert sInstance == this;
@@ skipping 74 matching lines @@
     }
 
     /**
      * Returns true if the native browser has started and created an instance of {@link
      * BackgroundSyncLauncher}.
      */
     protected static boolean hasInstance() {
         return sInstance != null;
     }
 
-    protected BackgroundSyncLauncher(Context context) {
-        mScheduler = GcmNetworkManager.getInstance(context);
+    protected BackgroundSyncLauncher() {
+        mScheduler = GcmNetworkManager.getInstance(ContextUtils.getApplicationContext());
         launchBrowserIfStopped(false, 0);
     }
 
-    private static boolean canUseGooglePlayServices(Context context) {
+    private static boolean canUseGooglePlayServices() {
         return ExternalAuthUtils.getInstance().canUseGooglePlayServices(
-                context, new UserRecoverableErrorHandler.Silent());
+                ContextUtils.getApplicationContext(), new UserRecoverableErrorHandler.Silent());
     }
 
     /**
      * Returns true if the Background Sync Manager should be automatically disabled on startup.
      * This is currently only the case if Play Services is not up to date, since any sync attempts
      * which fail cannot be reregistered. Better to wait until Play Services is updated before
      * attempting them.
      *
-     * @param context The application context.
      */
     @CalledByNative
-    private static boolean shouldDisableBackgroundSync(Context context) {
+    private static boolean shouldDisableBackgroundSync() {
         // Check to see if Play Services is up to date, and disable GCM if not.
         // This will not automatically set {@link sGCMEnabled} to true, in case it has been
         // disabled in tests.
         if (sGCMEnabled) {
             boolean isAvailable = true;
-            if (!canUseGooglePlayServices(context)) {
+            if (!canUseGooglePlayServices()) {
                 setGCMEnabled(false);
                 Log.i(TAG, "Disabling Background Sync because Play Services is not up to date.");
                 isAvailable = false;
             }
             RecordHistogram.recordBooleanHistogram(
                     "BackgroundSync.LaunchTask.PlayServicesAvailable", isAvailable);
         }
         return !sGCMEnabled;
     }
 
@@ skipping 65 matching lines @@
                     }
                 };
         BackgroundSyncLauncher.shouldLaunchBrowserIfStopped(callback);
     }
 
     @VisibleForTesting
     static void setGCMEnabled(boolean enabled) {
         sGCMEnabled = enabled;
     }
 }