Revert of Move Java CachedMetrics functionality to base/.

chrome/android/java/src/org/chromium/chrome/browser/metrics/MediaNotificationUma.java

 // Copyright 2016 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.chrome.browser.metrics;
 
-import static org.chromium.base.metrics.CachedMetrics.EnumeratedHistogramSample;
+import static org.chromium.chrome.browser.metrics.LaunchMetrics.EnumeratedHistogramSample;
 
 import android.content.Intent;
 
 /**
  * Helper class to record which kind of media notifications does the user click to go back to
  * Chrome.
  */
 public class MediaNotificationUma {
     public static final int SOURCE_INVALID = -1;
     public static final int SOURCE_MEDIA = 0;
     public static final int SOURCE_PRESENTATION = 1;
     public static final int SOURCE_MEDIA_FLING = 2;
     public static final int SOURCE_MAX = 3;
 
     public static final String INTENT_EXTRA_NAME =
             "org.chromium.chrome.browser.metrics.MediaNotificationUma.EXTRA_CLICK_SOURCE";
 
     private static final EnumeratedHistogramSample sClickSourceHistogram =
-            new EnumeratedHistogramSample("Media.Notification.Click", SOURCE_MAX);
+            new LaunchMetrics.EnumeratedHistogramSample(
+                    "Media.Notification.Click", SOURCE_MAX);
 
     /**
      * Record the UMA as specified by {@link intent}. The {@link intent} should contain intent extra
      * of name {@link INTENT_EXTRA_NAME} indicating the type.
      * @param intent The intent starting the activity.
      */
     public static void recordClickSource(Intent intent) {
         if (intent == null) return;
         int source = intent.getIntExtra(INTENT_EXTRA_NAME, SOURCE_INVALID);
         if (source == SOURCE_INVALID || source >= SOURCE_MAX) return;
         sClickSourceHistogram.record(source);
     }
 }