[Checkstyle] Fix misc style issues in Java files.

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

 // Copyright 2012 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.base;
 
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
 import android.os.MessageQueue;
@@ skipping 66 matching lines @@
     }
 
     private void updateWhetherQueueHasBlockingSyncBarrier() {
         if (mMessageQueue == null) return;
         // As barrier detection is only used for tracing, early out when tracing
         // is disabled to avoid any potential performance penalties.
         if (!TraceEvent.enabled()) {
             mQueueHasSyncBarrier = false;
             return;
         }
-        Message queueHead = (Message)getField(mMessageQueue, mMessageQueueMessageField);
+        Message queueHead = (Message) getField(mMessageQueue, mMessageQueueMessageField);
         setqueueHasSyncBarrier(isSyncBarrierMessage(queueHead));
     }
 
     private boolean isSyncBarrierMessage(Message message) {
         if (message == null) return false;
         // Sync barrier messages have null targets.
         return getField(message, mMessageTargetField) == null;
     }
 
     private void tryEnableSyncBarrierDetection() {
         assert mMessageQueue == null;
 
         boolean success = false;
         try {
             Method getQueueMethod = Looper.class.getMethod("getQueue", new Class[]{});
-            mMessageQueue = (MessageQueue)getQueueMethod.invoke(getLooper());
+            mMessageQueue = (MessageQueue) getQueueMethod.invoke(getLooper());
 
             mMessageQueueMessageField = mMessageQueue.getClass().getDeclaredField("mMessages");
             mMessageQueueMessageField.setAccessible(true);
 
             mMessageTargetField = Message.class.getDeclaredField("target");
             mMessageTargetField.setAccessible(true);
 
             mSyncBarrierTraceId = hashCode();
 
             success = true;
@@ skipping 43 matching lines @@
      }
 
     @CalledByNative
     private static SystemMessageHandler create(long messagePumpDelegateNative) {
         return new SystemMessageHandler(messagePumpDelegateNative);
     }
 
     private native void nativeDoRunLoopOnce(
             long messagePumpDelegateNative, long delayedScheduledTimeTicks);
 }