Remove redundant field initialization in Java code.

media/base/android/java/src/org/chromium/media/AudioManagerAndroid.java

 // Copyright 2013 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.media;
 
 import android.annotation.TargetApi;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothManager;
 import android.content.BroadcastReceiver;
@@ skipping 146 matching lines @@
     // Return this value when getProperty(PROPERTY_OUTPUT_FRAMES_PER_BUFFER)
     // fails.
     private static final int DEFAULT_FRAME_PER_BUFFER = 256;
 
     private final AudioManager mAudioManager;
     private final Context mContext;
     private final long mNativeAudioManagerAndroid;
 
     // Enabled during initialization if MODIFY_AUDIO_SETTINGS permission is
     // granted. Required to shift system-wide audio settings.
-    private boolean mHasModifyAudioSettingsPermission = false;
+    private boolean mHasModifyAudioSettingsPermission;
 
     // Enabled during initialization if BLUETOOTH permission is granted.
-    private boolean mHasBluetoothPermission = false;
+    private boolean mHasBluetoothPermission;
 
     // Stores the audio states related to Bluetooth SCO audio, where some
     // states are needed to keep track of intermediate states while the SCO
     // channel is enabled or disabled (switching state can take a few seconds).
     private int mBluetoothScoState = STATE_BLUETOOTH_SCO_INVALID;
 
-    private boolean mIsInitialized = false;
+    private boolean mIsInitialized;
     private boolean mSavedIsSpeakerphoneOn;
     private boolean mSavedIsMicrophoneMute;
 
     // Id of the requested audio device. Can only be modified by
     // call to setDevice().
     private int mRequestedAudioDevice = DEVICE_INVALID;
 
     // This class should be created, initialized and closed on the audio thread
     // in the audio manager. We use |mNonThreadSafe| to ensure that this is
     // the case. Only active when |DEBUG| is set to true.
     private final NonThreadSafe mNonThreadSafe = new NonThreadSafe();
 
     // Lock to protect |mAudioDevices| and |mRequestedAudioDevice| which can
     // be accessed from the main thread and the audio manager thread.
     private final Object mLock = new Object();
 
     // Contains a list of currently available audio devices.
     private boolean[] mAudioDevices = new boolean[DEVICE_COUNT];
 
     private final ContentResolver mContentResolver;
-    private ContentObserver mSettingsObserver = null;
-    private HandlerThread mSettingsObserverThread = null;
+    private ContentObserver mSettingsObserver;
+    private HandlerThread mSettingsObserverThread;
     private int mCurrentVolume;
 
     // Broadcast receiver for wired headset intent broadcasts.
     private BroadcastReceiver mWiredHeadsetReceiver;
 
     // Broadcast receiver for Bluetooth headset intent broadcasts.
     // Utilized to detect changes in Bluetooth headset availability.
     private BroadcastReceiver mBluetoothHeadsetReceiver;
 
     // Broadcast receiver for Bluetooth SCO broadcasts.
@@ skipping 1037 matching lines @@
     }
 
     /** Unregister receiver for broadcasted ACTION_USB_DEVICE_ATTACHED/DETACHED intent. */
     private void unregisterForUsbAudioIntentBroadcast() {
         mContext.unregisterReceiver(mUsbAudioReceiver);
         mUsbAudioReceiver = null;
     }
 
     private native void nativeSetMute(long nativeAudioManagerAndroid, boolean muted);
 }