Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/metrics/WebappUma.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.metrics;
 
 import android.os.SystemClock;
 
 import org.chromium.base.metrics.RecordHistogram;
 
@@ skipping 33 matching lines @@
             "Webapp.Splashscreen.Icon.Type";
     public static final String HISTOGRAM_SPLASHSCREEN_ICON_SIZE =
             "Webapp.Splashscreen.Icon.Size";
     public static final String HISTOGRAM_SPLASHSCREEN_THEMECOLOR =
             "Webapp.Splashscreen.ThemeColor";
 
     private int mSplashScreenBackgroundColor = SPLASHSCREEN_COLOR_STATUS_MAX;
     private int mSplashScreenIconType = SPLASHSCREEN_ICON_TYPE_MAX;
     private int mSplashScreenIconSize = -1;
     private int mSplashScreenThemeColor = SPLASHSCREEN_COLOR_STATUS_MAX;
-    private long mSplashScreenVisibleTime = 0;
+    private long mSplashScreenVisibleTime;
 
-    private boolean mCommitted = false;
+    private boolean mCommitted;
 
     /**
      * Signal that the splash screen is now visible. This is being used to
      * record for how long the splash screen is left visible.
      */
     public void splashscreenVisible() {
         assert mSplashScreenVisibleTime == 0;
         mSplashScreenVisibleTime = SystemClock.elapsedRealtime();
     }
 
@@ skipping 79 matching lines @@
         mSplashScreenIconType = SPLASHSCREEN_ICON_TYPE_MAX;
         mSplashScreenIconSize = -1;
 
         assert mSplashScreenThemeColor != SPLASHSCREEN_COLOR_STATUS_MAX;
         RecordHistogram.recordEnumeratedHistogram(HISTOGRAM_SPLASHSCREEN_THEMECOLOR,
                 mSplashScreenThemeColor,
                 SPLASHSCREEN_COLOR_STATUS_MAX);
         mSplashScreenThemeColor = SPLASHSCREEN_COLOR_STATUS_MAX;
     }
 }