Move Android metrics files into a /metrics/ subfolder/package.

chrome/browser/android/uma_utils.cc

-// Copyright 2013 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.
-
-#include "chrome/browser/android/uma_utils.h"
-
-#include "jni/UmaUtils_jni.h"
-
-namespace chrome {
-namespace android {
-
-base::Time GetMainEntryPointTime() {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  int64 startTimeUnixMs = Java_UmaUtils_getMainEntryPointTime(env);
-  return base::Time::UnixEpoch() +
-         base::TimeDelta::FromMilliseconds(startTimeUnixMs);
-}
-
-bool RegisterStartupMetricUtils(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-}  // namespace android
-}  // namespace chrome