components: Create web_modal component.

chrome/browser/ui/chrome_modal_dialog_manager_delegate.cc

+// Copyright (c) 2013 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/chrome_modal_dialog_manager_delegate.h"
+
+#include "chrome/common/render_messages.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+ChromeModalDialogManagerDelegate::ChromeModalDialogManagerDelegate() {
+}
+
+ChromeModalDialogManagerDelegate::~ChromeModalDialogManagerDelegate() {
+}
+
+void ChromeModalDialogManagerDelegate::SetWebContentsBlocked(
+    content::WebContents* web_contents,
+    bool blocked) {
+  // RenderViewHost may be NULL during shutdown.
+  content::RenderViewHost* host = web_contents->GetRenderViewHost();
+  if (host) {
+    host->Send(new ChromeViewMsg_SetVisuallyDeemphasized(
+        host->GetRoutingID(), blocked));
+  }
+}
+