Expose br tag in AX Tree as ROLE_SYSTEM_WHITESPACE.

content/browser/accessibility/browser_accessibility.cc

 // 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.
 
 #include "content/browser/accessibility/browser_accessibility.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 33 matching lines @@
 }
 
 bool BrowserAccessibility::PlatformIsLeaf() const {
   if (InternalChildCount() == 0)
     return true;
 
   // All of these roles may have children that we use as internal
   // implementation details, but we want to expose them as leaves
   // to platform accessibility APIs.
   switch (GetRole()) {
+    case ui::AX_ROLE_LINE_BREAK:
     case ui::AX_ROLE_SLIDER:
     case ui::AX_ROLE_STATIC_TEXT:
     case ui::AX_ROLE_TEXT_AREA:
     case ui::AX_ROLE_TEXT_FIELD:
       return true;
     default:
       return false;
   }
 }
 
@@ skipping 646 matching lines @@
   if (GetRole() == ui::AX_ROLE_STATIC_TEXT)
     return static_cast<int>(GetStringAttribute(ui::AX_ATTR_VALUE).size());
 
   int len = 0;
   for (size_t i = 0; i < InternalChildCount(); ++i)
     len += InternalGetChild(i)->GetStaticTextLenRecursive();
   return len;
 }
 
 }  // namespace content