[Android] Upstream the WebView find-in-page API implementation.

android_webview/android_webview.gyp

 # Copyright (c) 2012 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'libwebview',
@@ skipping 14 matching lines @@
         'common/android_webview_message_generator.cc',
         'common/android_webview_message_generator.h',
         'common/render_view_messages.cc',
         'common/render_view_messages.h',
         'browser/aw_cookie_access_policy.cc',
         'browser/aw_cookie_access_policy.h',
         'browser/aw_http_auth_handler_base.cc',
         'browser/aw_http_auth_handler_base.h',
         'browser/aw_login_delegate.cc',
         'browser/aw_login_delegate.h',
+        'browser/find_helper.cc',
+        'browser/find_helper.h',
         'browser/net/aw_network_delegate.cc',
         'browser/net/aw_network_delegate.h',
         'browser/renderer_host/aw_render_view_host_ext.cc',
         'browser/renderer_host/aw_render_view_host_ext.h',
         'browser/renderer_host/aw_resource_dispatcher_host_delegate.cc',
         'browser/renderer_host/aw_resource_dispatcher_host_delegate.h',
+        'browser/scoped_allow_wait_for_legacy_web_view_api.h',
         'lib/aw_browser_dependency_factory_impl.cc',
         'lib/aw_browser_dependency_factory_impl.h',
         'lib/aw_content_browser_client.cc',
         'lib/aw_content_browser_client.h',
         'lib/main/aw_main_delegate.cc',
         'lib/main/aw_main_delegate.h',
         'lib/main/webview_entry_point.cc',
         'lib/main/webview_stubs.cc',
         'renderer/aw_render_view_ext.cc',
         'renderer/aw_render_view_ext.h',
@@ skipping 283 matching lines @@
             '-DANDROID_SDK_VERSION=<(android_sdk_version)',
             '-DANDROID_GDBSERVER=<(android_gdbserver)',
             '-buildfile',
             '<(DEPTH)/android_webview/javatests/android_webview_test_apk.xml',
           ]
         }
       ],
     },
   ],
 }