Adds new experimental accessibility extension api to enable or disable native accessibility.

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"
 #include "chrome/browser/extensions/api/tabs/tabs_constants.h"
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/infobars/infobar_delegate.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/common/error_utils.h"
 
 namespace keys = extension_accessibility_api_constants;
 
 // Returns the AccessibilityControlInfo serialized into a JSON string,
 // consisting of an array of a single object of type AccessibilityObject,
 // as defined in the accessibility extension api's json schema.
 scoped_ptr<ListValue> ControlInfoToEventArguments(
     const AccessibilityEventInfo* info) {
@@ skipping 142 matching lines @@
 }
 
 bool AccessibilitySetAccessibilityEnabledFunction::RunImpl() {
   bool enabled;
   EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
   ExtensionAccessibilityEventRouter::GetInstance()
       ->SetAccessibilityEnabled(enabled);
   return true;
 }
 
+bool AccessibilitySetNativeAccessibilityEnabledFunction::RunImpl() {
+  bool enabled;
+  EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
+  if (enabled) {
+    content::BrowserAccessibilityState::GetInstance()->
+        EnableAccessibility();
+  } else {
+    content::BrowserAccessibilityState::GetInstance()->
+        DisableAccessibility();
+  }
+  return true;
+}
+
 bool AccessibilityGetFocusedControlFunction::RunImpl() {
   // Get the serialized dict from the last focused control and return it.
   // However, if the dict is empty, that means we haven't seen any focus
   // events yet, so return null instead.
   ExtensionAccessibilityEventRouter *accessibility_event_router =
       ExtensionAccessibilityEventRouter::GetInstance();
   DictionaryValue *last_focused_control_dict =
       accessibility_event_router->last_focused_control_dict();
   if (last_focused_control_dict->size()) {
     SetResult(last_focused_control_dict->DeepCopyWithoutEmptyChildren());
@@ skipping 29 matching lines @@
       DictionaryValue* alert_value = new DictionaryValue;
       const string16 message_text = confirm_infobar_delegate->GetMessageText();
       alert_value->SetString(keys::kMessageKey, message_text);
       alerts_value->Append(alert_value);
     }
   }
 
   SetResult(alerts_value);
   return true;
 }