Add skeleton for select-to-speak component extension.

chrome/browser/extensions/component_extensions_whitelist/whitelist.cc

 // Copyright 2015 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/extensions/component_extensions_whitelist/whitelist.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 18 matching lines @@
 bool IsComponentExtensionWhitelisted(const std::string& extension_id) {
   const char* const kAllowed[] = {
     extension_misc::kHotwordSharedModuleId,
     extension_misc::kInAppPaymentsSupportAppId,
 #if defined(ENABLE_MEDIA_ROUTER)
     extension_misc::kMediaRouterStableExtensionId,
 #endif  // defined(ENABLE_MEDIA_ROUTER)
     extension_misc::kPdfExtensionId,
 #if defined(OS_CHROMEOS)
     extension_misc::kChromeVoxExtensionId,
+    extension_misc::kSelectToSpeakExtensionId,
     extension_misc::kSpeechSynthesisExtensionId,
     extension_misc::kZIPUnpackerExtensionId,
 #endif
   };
 
   for (size_t i = 0; i < arraysize(kAllowed); ++i) {
     if (extension_id == kAllowed[i])
       return true;
   }
 
@@ skipping 74 matching lines @@
   }
 
   LOG(ERROR) << "Component extension with manifest resource id "
              << manifest_resource_id << " not in whitelist and is not being "
              << "loaded as a result.";
   NOTREACHED();
   return false;
 }
 
 }  // namespace extensions