Disable network speech on Chrome OS temporarily.

BUG=314799
NOTRY=true

Review URL: https://codereview.chromium.org/55293006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233423 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/component_loader.cc

@@ -551,7 +551,9 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
 #endif
 
 #if defined(GOOGLE_CHROME_BUILD)
+#if !defined(OS_CHROMEOS)  // http://crbug.com/314799
   AddNetworkSpeechSynthesisExtension();
+#endif
 #endif  // defined(GOOGLE_CHROME_BUILD)
 }