webui: rename "DialogClose" to "dialogClose" to match other webui messages.

ui/web_dialogs/web_dialog_ui.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 "ui/web_dialogs/web_dialog_ui.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/lazy_instance.h"
 #include "base/values.h"
@@ skipping 61 matching lines @@
       static_cast<WebDialogDelegateUserData*>(
           web_contents->GetUserData(&kWebDialogDelegateUserDataKey));
 
   return user_data ? user_data->delegate() : NULL;
 }
 
 
 void WebDialogUI::RenderViewCreated(RenderViewHost* render_view_host) {
   // Hook up the javascript function calls, also known as chrome.send("foo")
   // calls in the HTML, to the actual C++ functions.
-  web_ui()->RegisterMessageCallback("DialogClose",
+  web_ui()->RegisterMessageCallback("dialogClose",
       base::Bind(&WebDialogUI::OnDialogClosed, base::Unretained(this)));
 
   // Pass the arguments to the renderer supplied by the delegate.
   std::string dialog_args;
   std::vector<WebUIMessageHandler*> handlers;
   WebDialogDelegate* delegate = GetDelegate(web_ui()->GetWebContents());
   if (delegate) {
     dialog_args = delegate->GetDialogArgs();
     delegate->GetWebUIMessageHandlers(&handlers);
   }
@@ skipping 26 matching lines @@
   // for security reasons. The code hosting the dialog should provide
   // dialog specific functionality through other bindings and methods
   // that are scoped in duration to the dialogs existence.
   web_ui->SetBindings(web_ui->GetBindings() & ~content::BINDINGS_POLICY_WEB_UI);
 }
 
 ExternalWebDialogUI::~ExternalWebDialogUI() {
 }
 
 }  // namespace ui