Rename UIActivityFindLoginActionSource to UIActivityURLSource.

ios/chrome/browser/ui/activity_services/chrome_activity_item_source.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/chrome_activity_item_source.h"
 
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #include "base/logging.h"
 #import "ios/chrome/browser/ui/activity_services/activity_type_util.h"
@@ skipping 85 matching lines @@
   return _image;
 }
 
 - (id)activityViewControllerPlaceholderItem:
     (UIActivityViewController*)activityViewController {
   return _image;
 }
 
 @end
 
-#pragma mark - UIActivityFindLoginActionSource
+#pragma mark - UIActivityURLSource
 
-@interface UIActivityFindLoginActionSource () {
+@interface UIActivityURLSource () {
   NSString* _subject;
   NSURL* _url;
   ThumbnailGeneratorBlock _thumbnailGenerator;
 }
 @end
 
-@implementation UIActivityFindLoginActionSource
+@implementation UIActivityURLSource
 
 - (instancetype)init {
   NOTREACHED();
   return nil;
 }
 
 - (instancetype)initWithURL:(NSURL*)url
                     subject:(NSString*)subject
          thumbnailGenerator:(ThumbnailGeneratorBlock)thumbnailGenerator {
   DCHECK(url);
@@ skipping 70 matching lines @@
 }
 
 - (UIImage*)activityViewController:
                 (UIActivityViewController*)activityViewController
      thumbnailImageForActivityType:(UIActivityType)activityType
                      suggestedSize:(CGSize)size {
   return _thumbnailGenerator(size);
 }
 
 @end