Make some updates to extension iconography.

chrome/browser/ui/webui/ntp/favicon_webui_handler.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
-#define CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
-
-#include <map>
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/task/cancelable_task_tracker.h"
-#include "components/favicon_base/favicon_types.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-class ExtensionIconColorManager;
-
-namespace base {
-class ListValue;
-}
-
-class FaviconWebUIHandler : public content::WebUIMessageHandler {
- public:
-  FaviconWebUIHandler();
-  ~FaviconWebUIHandler() override;
-
-  // WebUIMessageHandler
-  void RegisterMessages() override;
-
-  // Called from the JS to get the dominant color of a favicon. The first
-  // argument is a favicon URL, the second is the ID of the DOM node that is
-  // asking for it.
-  void HandleGetFaviconDominantColor(const base::ListValue* args);
-
-  // As above, but for an app tile. The sole argument is the extension ID.
-  void HandleGetAppIconDominantColor(const base::ListValue* args);
-
-  // Callback getting signal that an app icon is loaded.
-  void NotifyAppIconReady(const std::string& extension_id);
-
- private:
-  // Called when favicon data is available from the history backend.
-  void OnFaviconDataAvailable(
-      int request_handle,
-      const favicon_base::FaviconRawBitmapResult& bitmap_result);
-
-  base::CancelableTaskTracker cancelable_task_tracker_;
-
-  // Map from request ID to DOM ID so we can make the appropriate callback when
-  // the favicon request comes back. This map exists because
-  // CancelableRequestConsumerTSimple only takes POD keys.
-  std::map<int, std::string> dom_id_map_;
-  // A counter to track ID numbers as we use them.
-  int id_;
-
-  // Raw PNG representation of the favicon to show when the favicon
-  // database doesn't have a favicon for a webpage.
-  scoped_refptr<base::RefCountedMemory> default_favicon_;
-
-  // Manage retrieval of icons from apps.
-  std::unique_ptr<ExtensionIconColorManager> app_icon_color_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(FaviconWebUIHandler);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_