Don't expose Android set selection accessibility action for empty text fields

content/browser/accessibility/accessibility_tree_formatter_android.cc

 // Copyright 2013 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 "content/browser/accessibility/accessibility_tree_formatter.h"
 
 #include <string>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 17 matching lines @@
   "checked",
   "clickable",
   "collection",
   "collection_item",
   "content_invalid",
   "disabled",
   "dismissable",
   "editable_text",
   "focusable",
   "focused",
+  "has_non_empty_value",
   "heading",
   "hierarchical",
   "invisible",
   "link",
   "multiline",
   "password",
   "range",
   "scrollable",
   "selected"
 };
@@ skipping 62 matching lines @@
   dict->SetBoolean("checkable", android_node->IsCheckable());
   dict->SetBoolean("checked", android_node->IsChecked());
   dict->SetBoolean("clickable", android_node->IsClickable());
   dict->SetBoolean("collection", android_node->IsCollection());
   dict->SetBoolean("collection_item", android_node->IsCollectionItem());
   dict->SetBoolean("disabled", !android_node->IsEnabled());
   dict->SetBoolean("dismissable", android_node->IsDismissable());
   dict->SetBoolean("editable_text", android_node->IsEditableText());
   dict->SetBoolean("focusable", android_node->IsFocusable());
   dict->SetBoolean("focused", android_node->IsFocused());
+  dict->SetBoolean("has_non_empty_value", android_node->HasNonEmptyValue());
   dict->SetBoolean("heading", android_node->IsHeading());
   dict->SetBoolean("hierarchical", android_node->IsHierarchical());
   dict->SetBoolean("invisible", !android_node->IsVisibleToUser());
   dict->SetBoolean("link", android_node->IsLink());
   dict->SetBoolean("multiline", android_node->IsMultiLine());
   dict->SetBoolean("range", android_node->IsRangeType());
   dict->SetBoolean("password", android_node->IsPassword());
   dict->SetBoolean("scrollable", android_node->IsScrollable());
   dict->SetBoolean("selected", android_node->IsSelected());
 
@@ skipping 94 matching lines @@
 
 const std::string AccessibilityTreeFormatterAndroid::GetAllowString() {
   return "@ANDROID-ALLOW:";
 }
 
 const std::string AccessibilityTreeFormatterAndroid::GetDenyString() {
   return "@ANDROID-DENY:";
 }
 
 }  // namespace content