Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.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.customtabs;
 
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
@@ skipping 95 matching lines @@
          * @return Whether the default parameters are used for this session.
          */
         public boolean isDefault() {
             return !mIgnoreFragments && !mShouldPrerenderOnCellular;
         }
     }
 
     private final Context mContext;
     private final Map<CustomTabsSessionToken, SessionParams> mSessionParams = new HashMap<>();
     private final SparseBooleanArray mUidHasCalledWarmup = new SparseBooleanArray();
-    private boolean mWarmupHasBeenCalled = false;
+    private boolean mWarmupHasBeenCalled;
 
     public ClientManager(Context context) {
         mContext = context.getApplicationContext();
         RequestThrottler.loadInBackground(mContext);
     }
 
     /** Creates a new session.
      *
      * @param session Session provided by the client.
      * @param uid Client UID, as returned by Binder.getCallingUid(),
@@ skipping 294 matching lines @@
      * @param session The session that has been destroyed.
      */
     public synchronized void cleanupSession(CustomTabsSessionToken session) {
         SessionParams params = mSessionParams.get(session);
         if (params == null) return;
         mSessionParams.remove(session);
         if (params.disconnectCallback != null) params.disconnectCallback.run(session);
         mUidHasCalledWarmup.delete(params.uid);
     }
 }