Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellImpl.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.vr_shell;
 
 import static android.opengl.GLES20.GL_NEAREST;
 import static android.opengl.GLES20.GL_TEXTURE_MAG_FILTER;
 import static android.opengl.GLES20.GL_TEXTURE_MIN_FILTER;
 import static android.opengl.GLES20.glBindTexture;
@@ skipping 59 matching lines @@
     // Temporary values that will be changed when the UI loads and figures out how what size it
     // needs to be.
     private static final float DEFAULT_UI_WIDTH = 1920f;
     private static final float DEFAULT_UI_HEIGHT = 1080f;
 
     private final GLSurfaceView mGlSurfaceView;
     private final Activity mActivity;
     private final VirtualDisplayAndroid mContentVirtualDisplay;
     private final VirtualDisplayAndroid mUiVirtualDisplay;
 
-    private long mNativeVrShell = 0;
+    private long mNativeVrShell;
 
     private int mContentTextureHandle;
     private int mUiTextureHandle;
     private FrameListener mContentFrameListener;
     private FrameListener mUiFrameListener;
 
     private FrameLayout mContentCVCContainer;
     private FrameLayout mUiCVCContainer;
 
     // The tab that holds the main ContentViewCore.
@@ skipping 408 matching lines @@
     private native void nativeOnResumeOnUI(long nativeVrShell);
     private native void nativeSurfacesChangedOnUI(
             long nativeVrShell, Surface contentSurface, Surface uiSurface);
     private native void nativeContentBoundsChangedOnUI(long nativeVrShell, int width, int height,
             float dpr);
     private native void nativeUIBoundsChangedOnUI(long nativeVrShell, int width, int height,
             float dpr);
     private native void nativeUpdateCompositorLayersOnUI(long nativeVrShell);
     private native void nativeSetWebVrModeOnUI(long nativeVrShell, boolean enabled);
 }