Add a virtual keyboard webui at chrome://keyboard/

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 5f4da14d79716c9aa494bbf54af523e440e2a300..a9d9e66fb31079e851950c0c831ee774ed6cb19a 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -329,6 +329,13 @@ void ComponentLoader::AddChromeApp() {
 #endif
 }
 
+void ComponentLoader::AddVirtualKeyboardApp() {
+#if defined(USE_ASH)
+  std::string id = Add(IDR_VIRTUAL_KEYBOARD_MANIFEST,
+      base::FilePath(FILE_PATH_LITERAL("virtual_keyboard")));
+#endif
+}
+
 // static
 void ComponentLoader::EnableBackgroundExtensionsForTesting() {
   enable_background_extensions_during_testing = true;
@@ -381,6 +388,7 @@ void ComponentLoader::AddDefaultComponentExtensions(
     AddOrReloadEnterpriseWebStore();
 
     AddChromeApp();
+    AddVirtualKeyboardApp();
   }
 
   AddDefaultComponentExtensionsWithBackgroundPages(skip_session_components);