Expose thumbnails of pages to iOS share extensions.

ios/chrome/browser/ui/activity_services/share_to_data.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_TO_DATA_H_
 #define IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_TO_DATA_H_
 
 #import <UIKit/UIKit.h>
 
+#include "ios/chrome/browser/ui/activity_services/chrome_activity_item_thumbnail_generator.h"
 #include "url/gurl.h"
 
 @interface ShareToData : NSObject
 
 // Designated initializer.
 - (id)initWithURL:(const GURL&)url
-              title:(NSString*)title
-    isOriginalTitle:(BOOL)isOriginalTitle
-    isPagePrintable:(BOOL)isPagePrintable;
+                 title:(NSString*)title
+       isOriginalTitle:(BOOL)isOriginalTitle
+       isPagePrintable:(BOOL)isPagePrintable
+    thumbnailGenerator:(ThumbnailGenerator)thumbnailGenerator;
 
 @property(nonatomic, readonly) const GURL& url;
 // NSURL version of 'url'. Use only for passing to libraries that take NSURL.
 @property(strong, nonatomic, readonly) NSURL* nsurl;
 @property(nonatomic, readonly, copy) NSString* title;
 @property(nonatomic, readonly, assign) BOOL isOriginalTitle;
 @property(nonatomic, readonly, assign) BOOL isPagePrintable;
 @property(nonatomic, strong) UIImage* image;
+@property(nonatomic, copy) ThumbnailGenerator thumbnailGenerator;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_TO_DATA_H_