Reading List: Show "Read Later" only on HTTP or HTTPS scheme.

ios/chrome/browser/ui/browser_view_controller.mm

 // Copyright 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/browser_view_controller.h"
 
 #import <AssetsLibrary/AssetsLibrary.h>
 #import <MobileCoreServices/MobileCoreServices.h>
 #import <PassKit/PassKit.h>
 #import <Photos/Photos.h>
@@ skipping 2464 matching lines @@
           Record(ACTION_OPEN_IN_INCOGNITO_TAB, isImage, isLink);
           [weakSelf webPageOrderedOpen:link
                               referrer:referrer
                             windowName:nil
                            inIncognito:YES
                           inBackground:NO
                               appendTo:kCurrentTab];
         };
         [_contextMenuCoordinator addItemWithTitle:title action:action];
       }
-
-      if (reading_list::switches::IsReadingListEnabled()) {
-        NSString* innerText = params.link_text;
-        if ([innerText length] > 0) {
-          // Add to reading list.
-          title = l10n_util::GetNSStringWithFixup(
-              IDS_IOS_CONTENT_CONTEXT_ADDTOREADINGLIST);
-          action = ^{
-            Record(ACTION_READ_LATER, isImage, isLink);
-            [weakSelf addToReadingListURL:link title:innerText];
-          };
-          [_contextMenuCoordinator addItemWithTitle:title action:action];
-        }
+    }
+    if (link.SchemeIsHTTPOrHTTPS() &&
+        reading_list::switches::IsReadingListEnabled()) {
+      NSString* innerText = params.link_text;
+      if ([innerText length] > 0) {
+        // Add to reading list.
+        title = l10n_util::GetNSStringWithFixup(
+            IDS_IOS_CONTENT_CONTEXT_ADDTOREADINGLIST);
+        action = ^{
+          Record(ACTION_READ_LATER, isImage, isLink);
+          [weakSelf addToReadingListURL:link title:innerText];
+        };
+        [_contextMenuCoordinator addItemWithTitle:title action:action];
       }
     }
     // Copy Link.
     title = l10n_util::GetNSStringWithFixup(IDS_IOS_CONTENT_CONTEXT_COPY);
     action = ^{
       Record(ACTION_COPY_LINK_ADDRESS, isImage, isLink);
       NSURL* url = net::NSURLWithGURL(link);
       NSDictionary* item = @{
         (NSString*)kUTTypeURL : url,
         (NSString*)kUTTypeUTF8PlainText :
@@ skipping 2629 matching lines @@
 
 - (UIView*)voiceSearchButton {
   return _voiceSearchButton;
 }
 
 - (id<LogoAnimationControllerOwner>)logoAnimationControllerOwner {
   return [self currentLogoAnimationControllerOwner];
 }
 
 @end