Make views Slider accessible on Chrome OS

chrome/browser/accessibility/accessibility_events.h

 // 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.
 
 #ifndef CHROME_BROWSER_ACCESSIBILITY_ACCESSIBILITY_EVENTS_H_
 #define CHROME_BROWSER_ACCESSIBILITY_ACCESSIBILITY_EVENTS_H_
 #pragma once
 
 #include <string>
 #include "base/compiler_specific.h"
@@ skipping 296 matching lines @@
   int item_count() const { return item_count_; }
   bool has_submenu() const { return has_submenu_; }
 
  private:
   bool has_submenu_;
   // The 0-based index of the current item and the number of total items.
   int item_index_;
   int item_count_;
 };
 
+// Accessibility information about a slider passed to onControlFocused
+// and onControlAction event listeners.
+class AccessibilitySliderInfo : public AccessibilityControlInfo {
+ public:
+  AccessibilitySliderInfo(Profile* profile,
+                          const std::string& name,
+                          const std::string& context,
+                          const std::string& value);
+
+  virtual const char* type() const OVERRIDE;
+
+  virtual void SerializeToDict(base::DictionaryValue* dict) const OVERRIDE;
+
+  const std::string& value() const { return value_; }
+
+ private:
+  std::string value_;
+};
+
 #endif  // CHROME_BROWSER_ACCESSIBILITY_ACCESSIBILITY_EVENTS_H_