Fix WebView accessibility

content/test/BUILD.gn

 # Copyright 2014 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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
@@ skipping 246 matching lines @@
     "//content/browser:for_content_tests",
     "//content/public/browser",
     "//content/public/common",
     "//third_party/WebKit/public:blink",
   ]
   deps = [
     "//base:base",
     "//content/public/app:both",
     "//net:test_support",
     "//testing/gtest",
+    "//ui/accessibility",
     "//ui/base",
     "//ui/base:test_support",
     "//ui/base/ime",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/events:gesture_detection",
     "//ui/resources",
   ]
 }
 
@@ skipping 741 matching lines @@
         "//gpu:test_support",
         "//media/base/android",
         "//media/base/android:media_java",
         "//media/capture/video/android:capture_java",
         "//testing/gmock",
         "//ui/android:ui_java",
       ]
     }
   }
 }