Change target+selector for block in InfoBarView

ios/chrome/browser/ui/infobars/infobar_view.mm

 // 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.
 
 #import "ios/chrome/browser/ui/infobars/infobar_view.h"
 
 #import <CoreGraphics/CoreGraphics.h>
 #import <QuartzCore/QuartzCore.h>
 
 #include "base/format_macros.h"
@@ skipping 746 matching lines @@
     NSRange rangeOfLink =
         NSMakeRange(NSMaxRange(startingRange),
                     endingRange.location - NSMaxRange(startingRange));
     NSString* link = [string substringWithRange:rangeOfLink];
     NSString* afterLink = [string substringFromIndex:NSMaxRange(endingRange)];
     string = [NSString stringWithFormat:@"%@%@%@", beforeLink, link, afterLink];
   }
 }
 
 - (void)addLabel:(NSString*)label {
-  [self addLabel:label target:nil action:nil];
+  [self addLabel:label action:nil];
 }
 
-- (void)addLabel:(NSString*)text target:(id)target action:(SEL)action {
+- (void)addLabel:(NSString*)text action:(void (^)(NSUInteger))action {
   markedLabel_.reset([text copy]);
-  if (target)
+  if (action)
     text = [self stripMarkersFromString:text];
   if ([label_ superview]) {
     [label_ removeFromSuperview];
   }
 
   label_ = [[[UILabel alloc] initWithFrame:CGRectZero] autorelease];
 
   UIFont* font = [MDCTypography subheadFont];
 
   [label_ setBackgroundColor:[UIColor clearColor]];
@@ skipping 10 matching lines @@
 
   [label_ setAttributedText:[[[NSAttributedString alloc]
                                 initWithString:text
                                     attributes:attributes] autorelease]];
 
   [self addSubview:label_];
 
   if (linkRanges_.empty())
     return;
 
-  DCHECK([target respondsToSelector:action]);
-
   labelLinkController_.reset([[LabelLinkController alloc]
       initWithLabel:label_
              action:^(const GURL& gurl) {
-               NSUInteger actionTag = [base::SysUTF8ToNSString(
-                   gurl.ExtractFileName()) integerValue];
-               [target performSelector:action withObject:@(actionTag)];
+               if (action) {
+                 NSUInteger actionTag = [base::SysUTF8ToNSString(
+                     gurl.ExtractFileName()) integerValue];
+                 action(actionTag);
+               }
              }]);
 
   [labelLinkController_ setLinkUnderlineStyle:NSUnderlineStyleSingle];
   [labelLinkController_ setLinkColor:[UIColor blackColor]];
 
   std::vector<std::pair<NSUInteger, NSRange>>::const_iterator it;
   for (it = linkRanges_.begin(); it != linkRanges_.end(); ++it) {
     // The last part of the URL contains the tag, so it can be retrieved in the
     // callback. This tag is generally a command ID.
     std::string url = std::string(kChromeInfobarURL) +
@@ skipping 124 matching lines @@
 
 - (CGFloat)buttonMargin {
   return kButtonMargin;
 }
 
 - (const std::vector<std::pair<NSUInteger, NSRange>>&)linkRanges {
   return linkRanges_;
 }
 
 @end