Initial checkin of the HTML downloads UI. It's not yet complete (lacking...

chrome/browser/dom_ui/fileicon_source.h

+// Copyright (c) 2006-2008 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.
+
+#ifndef CHROME_BROWSER_DOM_UI_FILEICON_SOURCE_H_
+#define CHROME_BROWSER_DOM_UI_FILEICON_SOURCE_H_
+
+#include "chrome/browser/dom_ui/chrome_url_data_manager.h"
+#include "chrome/browser/icon_manager.h"
+#include "chrome/common/resource_bundle.h"
+
+class GURL;
+
+// FileIconSource is the gateway between network-level chrome:
+// requests for favicons and the history backend that serves these.
+class FileIconSource : public ChromeURLDataManager::DataSource {
+ public:
+  explicit FileIconSource();
+  virtual ~FileIconSource();
+
+  // Called when the network layer has requested a resource underneath
+  // the path we registered.
+  virtual void StartDataRequest(const std::string& path, int request_id);
+
+  virtual std::string GetMimeType(const std::string&) const {
+    // Rely on image decoder inferring the correct type.
+    return std::string();
+  }
+
+  // Called when favicon data is available from the history backend.
+  void OnFileIconDataAvailable(
+      IconManager::Handle request_handle,
+      SkBitmap* icon);
+
+ private:
+  CancelableRequestConsumerT<int, 0> cancelable_consumer_;
+
+  // Raw PNG representation of the favicon to show when the favicon
+  // database doesn't have a favicon for a webpage.
+  scoped_refptr<RefCountedBytes> default_favicon_;
+
+  DISALLOW_COPY_AND_ASSIGN(FileIconSource);
+};
+#endif  // CHROME_BROWSER_DOM_UI_FILEICON_SOURCE_H_
+