Support touch icon in FaviconHelper

chrome/browser/favicon_delegate.h

+// 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.
+
+#ifndef CHROME_BROWSER_FAVICON_DELEGATE_H__
+#define CHROME_BROWSER_FAVICON_DELEGATE_H__
+#pragma once
+
+#include "chrome/browser/icon_delegate.h"
+
+class TabContents;
+
+class FaviconDelegate : public IconDelegate {
+ public:
+  explicit FaviconDelegate(TabContents* tab_contents);
+  virtual ~FaviconDelegate();
+
+  virtual void UpdateFaviconImageData(NavigationEntry* entry,
+                                      const GURL& url,
+                                      scoped_refptr<RefCountedMemory> data);
+
+  virtual void UpdateFaviconImageData(NavigationEntry* entry,
+                                      scoped_refptr<RefCountedMemory> data);
+
+  virtual void UpdateFaviconImageData(NavigationEntry* entry,
+                                      const SkBitmap& image);
+
+  virtual void UpdateFaviconURL(NavigationEntry* entry, const GURL& url);
+
+  // Scales the image such that either the width and/or height is 16 pixels
+  // wide. Does nothing if the image is empty.
+  virtual SkBitmap ConvertToFaviconSize(const SkBitmap& image) = 0;
+
+  virtual int GetIconSize();
+
+ private:
+  TabContents* tab_contents_;
+};
+
+#endif  // CHROME_BROWSER_FAVICON_DELEGATE_H__