Adds details role for blink layout tests

content/shell/renderer/test_runner/web_ax_object_proxy.cc

 // 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.
 
 #include "content/shell/renderer/test_runner/web_ax_object_proxy.h"
 
 #include "base/strings/stringprintf.h"
 #include "gin/handle.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
@@ skipping 54 matching lines @@
     case blink::WebAXRoleDateTime:
       return result.append("DateTimeField");
     case blink::WebAXRoleDefinition:
       return result.append("Definition");
     case blink::WebAXRoleDescriptionListDetail:
       return result.append("DescriptionListDetail");
     case blink::WebAXRoleDescriptionList:
       return result.append("DescriptionList");
     case blink::WebAXRoleDescriptionListTerm:
       return result.append("DescriptionListTerm");
+    case blink::WebAXRoleDetails:
+      return result.append("Details");
     case blink::WebAXRoleDialog:
       return result.append("Dialog");
     case blink::WebAXRoleDirectory:
       return result.append("Directory");
     case blink::WebAXRoleDisclosureTriangle:
       return result.append("DisclosureTriangle");
     case blink::WebAXRoleDiv:
       return result.append("Div");
     case blink::WebAXRoleDocument:
       return result.append("Document");
@@ skipping 1119 matching lines @@
   v8::Handle<v8::Value> value_handle = gin::CreateHandle(
       isolate, new RootWebAXObjectProxy(object, this)).ToV8();
   if (value_handle.IsEmpty())
     return v8::Handle<v8::Object>();
   v8::Handle<v8::Object> handle = value_handle->ToObject(isolate);
   elements_.Append(handle);
   return handle;
 }
 
 }  // namespace content