Add placeholder chrome://media-internals page.

chrome/browser/ui/webui/media_internals_ui.cc

+// Copyright (c) 2011 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/media_internals_ui.h"
+
+#include "base/memory/ref_counted_memory.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "chrome/common/jstemplate_builder.h"
+#include "chrome/common/url_constants.h"
+#include "grit/browser_resources.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace {
+
+class MediaInternalsHTMLSource : public ChromeURLDataManager::DataSource {
+ public:
+  MediaInternalsHTMLSource();
+
+  // Called when the network layer has requested a resource underneath
+  // the path we registered.
+  virtual void StartDataRequest(const std::string& path,
+                                bool is_incognito,
+                                int request_id);
+  virtual std::string GetMimeType(const std::string& path) const;
+
+ private:
+  virtual ~MediaInternalsHTMLSource() {}
+  DISALLOW_COPY_AND_ASSIGN(MediaInternalsHTMLSource);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// MediaInternalsHTMLSource
+//
+////////////////////////////////////////////////////////////////////////////////
+
+MediaInternalsHTMLSource::MediaInternalsHTMLSource()
+    : DataSource(chrome::kChromeUIMediaInternalsHost, MessageLoop::current()) {
+}
+
+void MediaInternalsHTMLSource::StartDataRequest(const std::string& path,
+                                                bool is_incognito,
+                                                int request_id) {
+  DictionaryValue localized_strings;
+  SetFontAndTextDirection(&localized_strings);
+
+  base::StringPiece html_template(
+      ResourceBundle::GetSharedInstance().GetRawDataResource(
+          IDR_MEDIA_INTERNALS_HTML));
+  std::string html(html_template.data(), html_template.size());
+  jstemplate_builder::AppendI18nTemplateSourceHtml(&html);
+  jstemplate_builder::AppendJsTemplateSourceHtml(&html);
+  jstemplate_builder::AppendJsonHtml(&localized_strings, &html);
+  jstemplate_builder::AppendI18nTemplateProcessHtml(&html);
+
+  scoped_refptr<RefCountedBytes> bytes(new RefCountedBytes());
+  bytes->data.resize(html.size());
+  std::copy(html.begin(), html.end(), bytes->data.begin());
+
+  SendResponse(request_id, bytes);
+}
+
+std::string MediaInternalsHTMLSource::GetMimeType(
+    const std::string& path) const {
+  return "text/html";
+}
+
+} // namespace
+
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// MediaInternalsUI
+//
+////////////////////////////////////////////////////////////////////////////////
+
+MediaInternalsUI::MediaInternalsUI(TabContents* contents)
+    : ChromeWebUI(contents) {
+  contents->profile()->GetChromeURLDataManager()->AddDataSource(
+      new MediaInternalsHTMLSource());
+}
+