Introduce the bottom sheet class for Chrome Home

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/ApplicationInitialization.java",
@@ skipping 1063 matching lines @@
   "java/src/org/chromium/chrome/browser/webapps/WebappDirectoryManager.java",
   "java/src/org/chromium/chrome/browser/webapps/WebappInfo.java",
   "java/src/org/chromium/chrome/browser/webapps/WebappLauncherActivity.java",
   "java/src/org/chromium/chrome/browser/webapps/WebappManagedActivity.java",
   "java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java",
   "java/src/org/chromium/chrome/browser/webapps/WebappUrlBar.java",
   "java/src/org/chromium/chrome/browser/webshare/ShareServiceImpl.java",
   "java/src/org/chromium/chrome/browser/webshare/ShareServiceImplementationFactory.java",
   "java/src/org/chromium/chrome/browser/widget/AlertDialogEditText.java",
   "java/src/org/chromium/chrome/browser/widget/AlwaysDismissedDialog.java",
+  "java/src/org/chromium/chrome/browser/widget/BottomSheet.java",
   "java/src/org/chromium/chrome/browser/widget/BoundedLinearLayout.java",
   "java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java",
   "java/src/org/chromium/chrome/browser/widget/CompatibilityTextInputLayout.java",
   "java/src/org/chromium/chrome/browser/widget/ControlContainer.java",
   "java/src/org/chromium/chrome/browser/widget/DateDividedAdapter.java",
   "java/src/org/chromium/chrome/browser/widget/DualControlLayout.java",
   "java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java",
   "java/src/org/chromium/chrome/browser/widget/FadingShadow.java",
   "java/src/org/chromium/chrome/browser/widget/FadingShadowView.java",
   "java/src/org/chromium/chrome/browser/widget/FloatLabelLayout.java",
@@ skipping 464 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" ]
 }