Add support for robolectric play-services-shadows.

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 1592 matching lines @@
   "junit/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSectionTest.java",
   "junit/src/org/chromium/chrome/browser/ntp/cards/SectionListTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/BackgroundOfflinerTaskTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/ClientIdTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridgeUnitTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/OfflinePageTabObserverTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtilsUnitTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/ShadowDeviceConditions.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/ShadowGcmNetworkManager.java",
-  "junit/src/org/chromium/chrome/browser/offlinepages/ShadowGoogleApiAvailability.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/StubBackgroundSchedulerProcessor.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/TaskExtrasPackerTest.java",
   "junit/src/org/chromium/chrome/browser/offlinepages/downloads/OfflinePageDownloadBridgeTest.java",
   "junit/src/org/chromium/chrome/browser/omaha/ResponseParserTest.java",
   "junit/src/org/chromium/chrome/browser/omaha/VersionNumberTest.java",
   "junit/src/org/chromium/chrome/browser/payments/AndroidPaymentAppFinderTest.java",
   "junit/src/org/chromium/chrome/browser/payments/AutofillContactTest.java",
   "junit/src/org/chromium/chrome/browser/payments/AutofillContactUnitTest.java",
   "junit/src/org/chromium/chrome/browser/payments/PaymentManifestVerifierTest.java",
   "junit/src/org/chromium/chrome/browser/physicalweb/PwsClientImplTest.java",
@@ skipping 22 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" ]
 }