Stop showing snackbar with success message when sharing with Chrome iOS.

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

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_PROTOCOL_H_
 #define IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_PROTOCOL_H_
 
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
@@ skipping 14 matching lines @@
   // The share was attempted, but failed with an unspecified error.
   SHARE_ERROR,
   // The share was attempted, and the result is unknown.
   SHARE_UNKNOWN_RESULT,
 };
 
 }  // namespace ShareTo
 
 // This protocol provides callbacks for sharing events.
 @protocol ShareToDelegate<NSObject>
-// Callback triggered on completion of sharing. |successMessage| gives the
-// message to be displayed on successful completion. If |successMessage| is nil,
-// no message is displayed.
+// Callback triggered on completion of sharing. |completionMessage| gives the
+// message to be displayed on completion. If |completionMessage| is nil, no
+// message is displayed.
 - (void)shareDidComplete:(ShareTo::ShareResult)shareStatus
-          successMessage:(NSString*)message;
+       completionMessage:(NSString*)message;
 
 // Callback triggered if user invoked a Password Management App Extension.
 // If |shareStatus| is a successful status, delegate implementing this method
 // should find a login form on the current page and autofills it with the
-// |username| and |password|. |successMessage|, if non-nil, is the message to
-// be displayed on successful completion.
+// |username| and |password|. |completionMessage|, if non-nil, is the message to
+// be displayed on completion.
 - (void)passwordAppExDidFinish:(ShareTo::ShareResult)shareStatus
                       username:(NSString*)username
                       password:(NSString*)password
-                successMessage:(NSString*)message;
+             completionMessage:(NSString*)message;
 @end
 
 namespace ios {
 class ChromeBrowserState;
 }
 
 @protocol ShareProtocol<NSObject>
 
 // Returns YES if a share is currently in progress.
 - (BOOL)isActive;
@@ skipping 10 matching lines @@
 // zero.
 - (void)shareWithData:(ShareToData*)data
            controller:(UIViewController*)controller
          browserState:(ios::ChromeBrowserState*)browserState
       shareToDelegate:(id<ShareToDelegate>)delegate
              fromRect:(CGRect)rect
                inView:(UIView*)inView;
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_ACTIVITY_SERVICES_SHARE_PROTOCOL_H_