Create profile .ico file on profile creation

ui/gfx/icon_util.h

Index: ui/gfx/icon_util.h
diff --git a/ui/gfx/icon_util.h b/ui/gfx/icon_util.h
index 7ce5606f525d0f7b92b6ceaef7158ca0e1dec360..f68d78498171eb3a22802a0fff1688db6bb643c2 100644
--- a/ui/gfx/icon_util.h
+++ b/ui/gfx/icon_util.h
@@ -11,6 +11,7 @@
 
 #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"
@@ -136,6 +137,19 @@ class UI_EXPORT IconUtil {
                                    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