Expose thumbnails of pages to iOS share extensions.

ios/chrome/browser/ui/activity_services/activity_service_controller.mm

 // Copyright 2014 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/activity_services/activity_service_controller.h"
 
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 178 matching lines @@
 
 - (NSArray*)activityItemsForData:(ShareToData*)data {
   NSMutableArray* activityItems = [NSMutableArray array];
   // ShareToData object guarantees that there is a NSURL.
   DCHECK(data.nsurl);
 
   // In order to support find-login-action protocol, the provider object
   // UIActivityFindLoginActionSource supports both Password Management
   // App Extensions (e.g. 1Password) and also provide a public.url UTType
   // for Share Extensions (e.g. Facebook, Twitter).
   UIActivityFindLoginActionSource* loginActionProvider =

[Olivier, 2017/01/25 16:10:33]

Still need a name change.

[jif, 2017/01/25 16:45:43]

Added a TODO.

-      [[UIActivityFindLoginActionSource alloc] initWithURL:data.nsurl
-                                                   subject:data.title];
+      [[UIActivityFindLoginActionSource alloc]
+                 initWithURL:data.nsurl
+                     subject:data.title
+          thumbnailGenerator:data.thumbnailGenerator];
   [activityItems addObject:loginActionProvider];
 
   UIActivityTextSource* textProvider =
       [[UIActivityTextSource alloc] initWithText:data.title];
   [activityItems addObject:textProvider];
 
   if (data.image) {
     UIActivityImageSource* imageProvider =
         [[UIActivityImageSource alloc] initWithImage:data.image];
     [activityItems addObject:imageProvider];
@@ skipping 82 matching lines @@
   return NO;
 }
 
 #pragma mark - For Testing
 
 - (void)setShareToDelegateForTesting:(id<ShareToDelegate>)delegate {
   shareToDelegate_ = delegate;
 }
 
 @end