Create profile .ico file on profile creation

ui/gfx/icon_util.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 UI_GFX_ICON_UTIL_H_
 #define UI_GFX_ICON_UTIL_H_
 
 #include <windows.h>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
+#include "base/md5.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/ui_export.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/size.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace gfx {
@@ skipping 105 matching lines @@
       const gfx::ImageFamily& image_family,
       const base::FilePath& icon_path);
 
   // Creates a cursor of the specified size from the DIB passed in.
   // Returns the cursor on success or NULL on failure.
   static HICON CreateCursorFromDIB(const gfx::Size& icon_size,
                                    const gfx::Point& hotspot,
                                    const void* dib_bits,
                                    size_t dib_size);
 
+  // Calculates checksum of an icon family using MD5.
+  // The checksum is derived from all of the icons in the family.
+  static void GetImageCheckSum(const gfx::ImageFamily& image,
+                               base::MD5Digest* digest);
+
+  // Saves |image| as an |icon_file| with the checksum.
+  static bool SaveIconWithCheckSum(const base::FilePath& icon_file,
+                                   const gfx::ImageFamily& image);
+
+  // Returns true if |icon_file| is missing or different from |image|.
+  static bool ShouldUpdateIcon(const base::FilePath& icon_file,
+                               const gfx::ImageFamily& image);
+
  private:
   // The icon format is published in the MSDN but there is no definition of
   // the icon file structures in any of the Windows header files so we need to
   // define these structure within the class. We must make sure we use 2 byte
   // packing so that the structures are layed out properly within the file.
   // See: http://msdn.microsoft.com/en-us/library/ms997538.aspx
 #pragma pack(push)
 #pragma pack(2)
 
   // ICONDIRENTRY contains meta data for an individual icon image within a
@@ skipping 115 matching lines @@
   // A helper function of CreateSkBitmapFromHICON.
   static SkBitmap CreateSkBitmapFromHICONHelper(HICON icon,
                                                 const gfx::Size& s);
 
   // Prevent clients from instantiating objects of that class by declaring the
   // ctor/dtor as private.
   DISALLOW_IMPLICIT_CONSTRUCTORS(IconUtil);
 };
 
 #endif  // UI_GFX_ICON_UTIL_H_