Photo Picker dialog: Add UMA statistics.

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadUtils.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.download;
 
 import android.app.Activity;
 import android.app.PendingIntent;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
@@ skipping 76 matching lines @@
 
     private static final String TAG = "download";
 
     private static final String DEFAULT_MIME_TYPE = "*/*";
     private static final String MIME_TYPE_DELIMITER = "/";
     private static final String MIME_TYPE_VIDEO = "video";
 
     private static final String EXTRA_IS_OFF_THE_RECORD =
             "org.chromium.chrome.browser.download.IS_OFF_THE_RECORD";
 
-    private static final long BYTES_PER_KILOBYTE = 1024;
-    private static final long BYTES_PER_MEGABYTE = 1024 * 1024;
-    private static final long BYTES_PER_GIGABYTE = 1024 * 1024 * 1024;
+    public static final int BYTES_PER_KILOBYTE = 1024;
+    public static final int BYTES_PER_MEGABYTE = 1024 * 1024;
+    public static final int BYTES_PER_GIGABYTE = 1024 * 1024 * 1024;

[Theresa, 2017/06/01 15:58:04]

These should move to a place that makes sense for downloads and photo_picker to
share. Perhaps a new ConversionUtils.java?

 
     @VisibleForTesting
     static final long SECONDS_PER_MINUTE = TimeUnit.MINUTES.toSeconds(1);
     @VisibleForTesting
     static final long SECONDS_PER_HOUR = TimeUnit.HOURS.toSeconds(1);
     @VisibleForTesting
     static final long SECONDS_PER_DAY = TimeUnit.DAYS.toSeconds(1);
 
     @VisibleForTesting
     static final String ELLIPSIS = "\u2026";
@@ skipping 770 matching lines @@
     public static Date getDateAtMidnight(long timestamp) {
         Calendar cal = Calendar.getInstance();
         cal.setTimeInMillis(timestamp);
         cal.set(Calendar.HOUR_OF_DAY, 0);
         cal.set(Calendar.MINUTE, 0);
         cal.set(Calendar.SECOND, 0);
         cal.set(Calendar.MILLISECOND, 0);
         return cal.getTime();
     }
 }