Photo Picker dialog: Add UMA statistics.

chrome/android/java_sources.gni

 # 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.
 
 chrome_java_sources = [
   "java/src/com/google/android/apps/chrome/appwidget/bookmarks/BookmarkThumbnailWidgetProvider.java",
   "java/src/org/chromium/chrome/browser/ActivityTabTaskDescriptionHelper.java",
   "java/src/org/chromium/chrome/browser/ActivityTaskDescriptionIconGenerator.java",
   "java/src/org/chromium/chrome/browser/AfterStartupTaskUtils.java",
   "java/src/org/chromium/chrome/browser/AppIndexingUtil.java",
@@ skipping 1119 matching lines @@
   "java/src/org/chromium/chrome/browser/toolbar/ToolbarPhone.java",
   "java/src/org/chromium/chrome/browser/toolbar/ToolbarTabController.java",
   "java/src/org/chromium/chrome/browser/toolbar/ToolbarTablet.java",
   "java/src/org/chromium/chrome/browser/upgrade/PackageReplacedBroadcastReceiver.java",
   "java/src/org/chromium/chrome/browser/upgrade/UpgradeActivity.java",
   "java/src/org/chromium/chrome/browser/upgrade/UpgradeIntentService.java",
   "java/src/org/chromium/chrome/browser/util/AccessibilityUtil.java",
   "java/src/org/chromium/chrome/browser/util/ChromeContextUtil.java",
   "java/src/org/chromium/chrome/browser/util/ChromeFileProvider.java",
   "java/src/org/chromium/chrome/browser/util/ColorUtils.java",
+  "java/src/org/chromium/chrome/browser/util/ConversionUtils.java",
   "java/src/org/chromium/chrome/browser/util/FeatureUtilities.java",
   "java/src/org/chromium/chrome/browser/util/HashUtil.java",
   "java/src/org/chromium/chrome/browser/util/IntentUtils.java",
   "java/src/org/chromium/chrome/browser/util/KeyNavigationUtil.java",
   "java/src/org/chromium/chrome/browser/util/MathUtils.java",
   "java/src/org/chromium/chrome/browser/util/PlatformUtil.java",
   "java/src/org/chromium/chrome/browser/util/UrlUtilities.java",
   "java/src/org/chromium/chrome/browser/util/ViewUtils.java",
   "java/src/org/chromium/chrome/browser/vr_shell/NonPresentingGvrContext.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrClassesWrapper.java",
@@ skipping 648 matching lines @@
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/SyncTestBase.java",
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/TypedUrlsTest.java",
   "sync_shell/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseTypeDialogFragmentTest.java",
 ]
 
 # Only used for testing, should not be shipped to end users.
 if (!is_official_build) {
   chrome_java_sources += [ "java/src/org/chromium/chrome/browser/offlinepages/evaluation/OfflinePageEvaluationBridge.java" ]
   chrome_test_java_sources += [ "javatests/src/org/chromium/chrome/browser/offlinepages/OfflinePageSavePageLaterEvaluationTest.java" ]
 }