[Android] Add a transparent Activity in Chrome to handle Browser Action Intent

third_party/custom_tabs_client/BUILD.gn

 # Copyright 2015 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.
 
 import("//build/config/android/rules.gni")
 
 android_resources("chrome_tabs_client_example_apk_resources") {
   resource_dirs = [ "src/Application/src/main/res" ]
   android_manifest = "src/Application/src/main/AndroidManifest.xml"
   custom_package = "org.chromium.customtabsclient"
@@ skipping 25 matching lines @@
   ]
 
   deps = [
     ":custom_tabs_support_java",
   ]
   chromium_code = true
 }
 
 android_library("custom_tabs_support_java") {
   java_files = [
+    "src/customtabs/src/android/support/customtabs/browseractions/BrowserActionsIntent.java",
+    "src/customtabs/src/android/support/customtabs/browseractions/BrowserActionItem.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsCallback.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsClient.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsIntent.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsService.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsServiceConnection.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsSession.java",
     "src/customtabs/src/android/support/customtabs/CustomTabsSessionToken.java",
     "src/customtabs/src/android/support/customtabs/PostMessageService.java",
     "src/customtabs/src/android/support/customtabs/PostMessageServiceConnection.java",
   ]
   deps = [
     "//third_party/android_tools:android_support_annotations_java",
     "//third_party/android_tools:android_support_compat_java",
   ]
   srcjar_deps = [ ":chrome_custom_tabs_service_aidl" ]
   chromium_code = true
   run_findbugs_override = false
 }
 
 android_aidl("chrome_custom_tabs_service_aidl") {
   interface_file = "common.aidl"
 
   java_in_dir = "src/customtabs/src/android/support/customtabs"
   sources = [
     "$java_in_dir/ICustomTabsCallback.aidl",
     "$java_in_dir/ICustomTabsService.aidl",
     "$java_in_dir/IPostMessageService.aidl",
   ]
 }