Remove redundant field initialization in Java code.

base/android/java/src/org/chromium/base/PerfTraceEvent.java

Index: base/android/java/src/org/chromium/base/PerfTraceEvent.java
diff --git a/base/android/java/src/org/chromium/base/PerfTraceEvent.java b/base/android/java/src/org/chromium/base/PerfTraceEvent.java
index c0e4b2125f06393a41b08e88abcae87ae7c77935..8a87773ac4b764d2e232b43798f4feb79745e4bd 100644
--- a/base/android/java/src/org/chromium/base/PerfTraceEvent.java
+++ b/base/android/java/src/org/chromium/base/PerfTraceEvent.java
@@ -8,12 +8,12 @@ import android.os.Debug;
 import android.os.Debug.MemoryInfo;
 import android.util.Log;
 
-import org.chromium.base.annotations.SuppressFBWarnings;
-
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import org.chromium.base.annotations.SuppressFBWarnings;
+
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -42,7 +42,7 @@ import java.util.List;
 public class PerfTraceEvent {
     private static final int MAX_NAME_LENGTH = 40;
     private static final String MEMORY_TRACE_NAME_SUFFIX = "_BZR_PSS";
-    private static File sOutputFile = null;
+    private static File sOutputFile;
 
     /** The event types understood by the perf trace scripts. */
     private enum EventType {
@@ -63,9 +63,9 @@ public class PerfTraceEvent {
         }
     }
 
-    private static boolean sEnabled = false;
+    private static boolean sEnabled;
     private static boolean sTrackTiming = true;
-    private static boolean sTrackMemory = false;
+    private static boolean sTrackMemory;
 
     // A list of performance trace event strings.
     // Events are stored as a JSON dict much like TraceEvent.