Fix typos in comments "reciever" -> "receiver".

ios/chrome/browser/sessions/session_service.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/sessions/session_service.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/files/file_path.h"
 #include "base/location.h"
@@ skipping 170 matching lines @@
   // replaced.
   SessionWindowIOS* pendingSession = base::mac::ObjCCast<SessionWindowIOS>(
       [pendingWindows_ objectForKey:stashPath]);
   [pendingSession clearSessions];
   // Set |window| as the pending save for |stashPath|.
   [pendingWindows_ setObject:window forKey:stashPath];
   if (immediately) {
     [NSObject cancelPreviousPerformRequestsWithTarget:self];
     [self performSaveToDirectoryInBackground:stashPath];
   } else if (!pendingSession) {
-    // If there wasn't previously a delayed save pending for |stashPath}|,
+    // If there wasn't previously a delayed save pending for |stashPath|,
     // enqueue one now.
     [self performSelector:@selector(performSaveToDirectoryInBackground:)
                withObject:stashPath
                afterDelay:kSaveDelay];
   }
 }
 
 - (SessionWindowIOS*)loadWindowForBrowserState:
     (ios::ChromeBrowserState*)browserState {
   NSString* stashPath =
@@ skipping 43 matching lines @@
         base::ThreadRestrictions::AssertIOAllowed();
         NSFileManager* fileManager = [NSFileManager defaultManager];
         if (![fileManager fileExistsAtPath:sessionFile])
           return;
         if (![fileManager removeItemAtPath:sessionFile error:nil])
           CHECK(false) << "Unable to delete session file.";
       }));
 }
 
 @end