[Cronet] Fix up log TAGs to be accurate and prevent future inaccuracies.

components/cronet/android/java/src/org/chromium/net/CronetLibraryLoader.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.net;
 
 import android.content.Context;
 import android.os.Handler;
 import android.os.Looper;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;

[mef, 2016/07/13 19:15:58]

Some implementation modules use android.util.Log, while others use
org.chromium.base.Log.

We can't use org.chromium.base.Log in api, but in implementation we should be
consistent.

[pauljensen, 2016/08/17 11:58:33]

Done.

 import org.chromium.base.annotations.JNINamespace;
 
 /**
  * CronetLibraryLoader loads and initializes native library on main thread.
  */
 @JNINamespace("cronet")
 class CronetLibraryLoader {
     // Synchronize initialization.
     private static final Object sLoadLock = new Object();
-    private static final String TAG = "CronetLibraryLoader";
+    private static final String TAG = CronetLibraryLoader.class.getSimpleName();
     // Has library loading commenced?  Setting guarded by sLoadLock.
     private static volatile boolean sInitStarted = false;
     // Has ensureMainThreadInitialized() completed?  Only accessed on main thread.
     private static boolean sMainThreadInitDone = false;
 
     /**
      * Ensure that native library is loaded and initialized. Can be called from
      * any thread, the load and initialization is performed on main thread.
      */
     static void ensureInitialized(final Context context, final CronetEngine.Builder builder) {
@@ skipping 55 matching lines @@
         // the undesired initial network change observer notification, which
         // will cause active requests to fail with ERR_NETWORK_CHANGED.
         nativeCronetInitOnMainThread();
         sMainThreadInitDone = true;
     }
 
     // Native methods are implemented in cronet_library_loader.cc.
     private static native void nativeCronetInitOnMainThread();
     private static native String nativeGetCronetVersion();
 }