Expose br tag in AX Tree as ROLE_SYSTEM_WHITESPACE.

content/browser/accessibility/browser_accessibility_win.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_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include "base/strings/string_number_conversions.h"
@@ skipping 3795 matching lines @@
       break;
     case ui::AX_ROLE_TREE:
       ia_role_ = ROLE_SYSTEM_OUTLINE;
       break;
     case ui::AX_ROLE_TREE_GRID:
       ia_role_ = ROLE_SYSTEM_OUTLINE;
       break;
     case ui::AX_ROLE_TREE_ITEM:
       ia_role_ = ROLE_SYSTEM_OUTLINEITEM;
       break;
+    case ui::AX_ROLE_LINE_BREAK:
+      ia_role_ = ROLE_SYSTEM_WHITESPACE;
+      break;
     case ui::AX_ROLE_WINDOW:
       ia_role_ = ROLE_SYSTEM_WINDOW;
       break;
 
     // TODO(dmazzoni): figure out the proper MSAA role for all of these.
     case ui::AX_ROLE_DIRECTORY:
     case ui::AX_ROLE_IGNORED:
     case ui::AX_ROLE_LOG:
     case ui::AX_ROLE_NONE:
     case ui::AX_ROLE_PRESENTATIONAL:
@@ skipping 21 matching lines @@
   // The role should always be set.
   DCHECK(!role_name_.empty() || ia_role_);
 
   // If we didn't explicitly set the IAccessible2 role, make it the same
   // as the MSAA role.
   if (!ia2_role_)
     ia2_role_ = ia_role_;
 }
 
 }  // namespace content