Created skeleton for switch access component extension.

chrome/browser/chromeos/accessibility/accessibility_manager.cc

 // Copyright (c) 2013 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/chromeos/accessibility/accessibility_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 296 matching lines @@
     NOTREACHED();
   chromevox_loader_ = base::WrapUnique(new AccessibilityExtensionLoader(
       extension_misc::kChromeVoxExtensionId,
       resources_path.Append(extension_misc::kChromeVoxExtensionPath),
       base::Bind(&AccessibilityManager::PostUnloadChromeVox,
                  weak_ptr_factory_.GetWeakPtr())));
   select_to_speak_loader_ = base::WrapUnique(new AccessibilityExtensionLoader(
       extension_misc::kSelectToSpeakExtensionId,
       resources_path.Append(extension_misc::kSelectToSpeakExtensionPath),
       base::Closure()));
+  switch_access_loader_ = base::WrapUnique(new AccessibilityExtensionLoader(
+      extension_misc::kSwitchAccessExtensionId,
+      resources_path.Append(extension_misc::kSwitchAccessExtensionPath),
+      base::Closure()));
 }
 
 AccessibilityManager::~AccessibilityManager() {
   CHECK(this == g_accessibility_manager);
   AccessibilityStatusEventDetails details(ACCESSIBILITY_MANAGER_SHUTDOWN, false,
                                           ash::A11Y_NOTIFICATION_NONE);
   NotifyAccessibilityStatusChanged(details);
   input_method::InputMethodManager::Get()->RemoveObserver(this);
 
   if (chromevox_panel_) {
@@ skipping 591 matching lines @@
   if (!profile_)
     return;
 
   const bool enabled = profile_->GetPrefs()->GetBoolean(
       prefs::kAccessibilitySwitchAccessEnabled);
 
   if (switch_access_enabled_ == enabled)
     return;
   switch_access_enabled_ = enabled;
 
-  // TODO(dmazzoni): implement feature here.
+  if (enabled) {
+    switch_access_loader_->Load(profile_, base::Closure() /* done_cb */);
+  } else {
+    switch_access_loader_->Unload();
+  }
 }
 
 void AccessibilityManager::UpdateAccessibilityHighlightingFromPrefs() {
   if (!focus_highlight_enabled_ && !caret_highlight_enabled_ &&
       !cursor_highlight_enabled_) {
     if (accessibility_highlight_manager_)
       accessibility_highlight_manager_.reset();
     return;
   }
 
@@ skipping 440 matching lines @@
     content::BrowserContext* context) {
   keyboard_listener_extension_id_ = id;
 
   extensions::ExtensionRegistry* registry =
       extensions::ExtensionRegistry::Get(context);
   if (!extension_registry_observer_.IsObserving(registry) && !id.empty())
     extension_registry_observer_.Add(registry);
 }
 
 }  // namespace chromeos