Draw a focus ring around native views when ChromeVox is running.

chrome/browser/accessibility/accessibility_extension_api.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 "chrome/browser/accessibility/accessibility_extension_api.h"
 
 #include "base/json/json_writer.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/accessibility/accessibility_extension_api_constants.h"
@@ skipping 305 matching lines @@
 bool AccessibilityPrivateSetFocusRingFunction::RunSync() {
 #if defined(OS_CHROMEOS)
   base::ListValue* rect_values = NULL;
   EXTENSION_FUNCTION_VALIDATE(args_->GetList(0, &rect_values));
 
   std::vector<gfx::Rect> rects;
   for (size_t i = 0; i < rect_values->GetSize(); ++i) {
     base::DictionaryValue* rect_value = NULL;
     EXTENSION_FUNCTION_VALIDATE(rect_values->GetDictionary(i, &rect_value));
     int left, top, width, height;
-    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger("left", &left));
-    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger("top", &top));
-    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger("width", &width));
-    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger("height", &height));
+    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger(keys::kLeft, &left));
+    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger(keys::kTop, &top));
+    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger(keys::kWidth, &width));
+    EXTENSION_FUNCTION_VALIDATE(rect_value->GetInteger(keys::kHeight, &height));
     rects.push_back(gfx::Rect(left, top, width, height));
   }
 
   chromeos::AccessibilityFocusRingController::GetInstance()->SetFocusRing(
       rects);
   return true;
 #endif  // defined(OS_CHROMEOS)
 
   error_ = keys:: kErrorNotSupported;
   return false;
 }