Move FaviconAttributes to UI

ios/chrome/browser/favicon/favicon_attributes.mm

-// Copyright 2016 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.
-
-#import "ios/chrome/browser/favicon/favicon_attributes.h"
-
-#include "base/logging.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-@implementation FaviconAttributes
-@synthesize faviconImage = _faviconImage;
-@synthesize monogramString = _monogramString;
-@synthesize textColor = _textColor;
-@synthesize backgroundColor = _backgroundColor;
-
-- (instancetype)initWithImage:(UIImage*)image
-                     monogram:(NSString*)monogram
-                    textColor:(UIColor*)textColor
-              backgroundColor:(UIColor*)backgroundColor {
-  DCHECK(image || (monogram && textColor && backgroundColor));
-  self = [super init];
-  if (self) {
-    _faviconImage = image;
-    _monogramString = [monogram copy];
-    _textColor = textColor;
-    _backgroundColor = backgroundColor;
-  }
-
-  return self;
-}
-
-- (instancetype)initWithImage:(UIImage*)image {
-  DCHECK(image);
-  return
-      [self initWithImage:image monogram:nil textColor:nil backgroundColor:nil];
-}
-
-- (instancetype)initWithMonogram:(NSString*)monogram
-                       textColor:(UIColor*)textColor
-                 backgroundColor:(UIColor*)backgroundColor {
-  DCHECK(monogram && textColor && backgroundColor);
-  return [self initWithImage:nil
-                    monogram:monogram
-                   textColor:textColor
-             backgroundColor:backgroundColor];
-}
-
-+ (instancetype)attributesWithImage:(UIImage*)image {
-  return [[self alloc] initWithImage:image];
-}
-
-+ (instancetype)attributesWithMonogram:(NSString*)monogram
-                             textColor:(UIColor*)textColor
-                       backgroundColor:(UIColor*)backgroundColor {
-  return [[self alloc] initWithMonogram:monogram
-                              textColor:textColor
-                        backgroundColor:backgroundColor];
-}
-
-@end