Fix Cronet mapping of Android log level into Chrome LogSeverity.

components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java

 // Copyright 2014 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.net;
 
 import android.content.Context;
 import android.os.ConditionVariable;
 import android.os.Process;
 import android.util.Log;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
 
 /**
  * Provides context for the native HTTP operations.
  */
 @JNINamespace("cronet")
 public class UrlRequestContext {
-    private static final int LOG_NONE = 0;
-    private static final int LOG_DEBUG = 1;
-    private static final int LOG_VERBOSE = 2;
+    private static final int LOG_NONE = 3;  // LOG(FATAL), no VLOG.
+    private static final int LOG_DEBUG = -1;  // LOG(FATAL...INFO), VLOG(1)
+    private static final int LOG_VERBOSE = -2;  // LOG(FATAL...INFO), VLOG(2)
     private static final String LOG_TAG = "ChromiumNetwork";
 
     /**
      * Native peer object, owned by UrlRequestContext.
      */
     private long mUrlRequestContextPeer;
 
     private final ConditionVariable mStarted = new ConditionVariable();
 
     /**
@@ skipping 96 matching lines @@
 
     private native void nativeInitializeStatistics();
 
     private native String nativeGetStatisticsJSON(String filter);
 
     private native void nativeStartNetLogToFile(long urlRequestContextPeer,
             String fileName);
 
     private native void nativeStopNetLog(long urlRequestContextPeer);
 }