Add Finch flag for Copyless Paste

chrome/browser/flag_descriptions.cc

 // Copyright 2017 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.
 
 #include "chrome/browser/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 2934 matching lines @@
 
 const char kEnableEncryptionMigrationName[] =
     "Enable encryption migration of user data";
 
 const char kEnableEncryptionMigrationDescription[] =
     "If enabled and the device supports ARC, the user will be asked to update "
     "the encryption of user data when the user signs in.";
 
 #endif  // #if defined(OS_CHROMEOS)
 
+#if defined(OS_ANDROID)
+
+const char kEnableCopylessPasteName[] = "App Indexing (Copyless Paste)";
+
+const char kEnableCopylessPasteDescription[] =
+    "Provide suggestions for text input, based on your recent context. For "
+    "example, if you looked at a restaurant website and switched to the Maps "
+    "app, the keyboard would offer the name of that restaurant as a suggestion "
+    "to enter into the search bar. The data is indexed locally, and never sent "
+    "to the server. It's disabled in incognito mode.";
+
+#endif  // defined(OS_ANDROID)
+
 }  // namespace flag_descriptions