Implemented event-dispatching for button clicks.

chrome/browser/ui/webui/chromeos/login/base_screen_handler.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/ui/webui/chromeos/login/base_screen_handler.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
 #include "content/public/browser/web_ui.h"
@@ skipping 68 matching lines @@
   Initialize();
 }
 
 void BaseScreenHandler::GetLocalizedStrings(base::DictionaryValue* dict) {
   scoped_ptr<LocalizedValuesBuilder> builder(new LocalizedValuesBuilder(dict));
   DeclareLocalizedValues(builder.get());
   GetAdditionalParameters(dict);
 }
 
 void BaseScreenHandler::RegisterMessages() {
+  AddPrefixedCallback("userActed",
+                      &BaseScreenHandler::HandleUserAction);
   AddPrefixedCallback("contextChanged",
                       &BaseScreenHandler::HandleContextChanged);
   DeclareJSCallbacks();
 }
 
 void BaseScreenHandler::GetAdditionalParameters(base::DictionaryValue* dict) {
 }
 
 void BaseScreenHandler::CallJS(const std::string& method) {
   web_ui()->CallJavascriptFunction(FullMethodPath(method));
@@ skipping 12 matching lines @@
 
 gfx::NativeWindow BaseScreenHandler::GetNativeWindow() {
   return LoginDisplayHostImpl::default_host()->GetNativeWindow();
 }
 
 std::string BaseScreenHandler::FullMethodPath(const std::string& method) const {
   DCHECK(!method.empty());
   return js_screen_path_prefix_ + method;
 }
 
+void BaseScreenHandler::HandleUserAction(const std::string& action_id) {
+  if (base_screen_)
+    base_screen_->OnUserAction(action_id);
+}
+
 void BaseScreenHandler::HandleContextChanged(
     const base::DictionaryValue* diff) {
   if (diff && base_screen_)
     base_screen_->OnContextChanged(*diff);
 }
 
 }  // namespace chromeos