Spell success correctly.

chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc

 // 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.
 
 #include "chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.h"
 
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
@@ skipping 43 matching lines @@
     }
 
     file_system_ = parser.file_system()->GetWeakPtr();
     file_path_ = parser.file_path();
     file_opener_.reset(new ScopedFileOpener(
         parser.file_system(), parser.file_path(), OPEN_FILE_MODE_READ,
         base::Bind(&OperationRunner::OnOpenFileCompletedOnUIThread, this,
                    callback)));
   }
 
-  // Requests reading contents of a file. In case of either success or a failure
-  // |callback| is executed. It can be called many times, until |has_more| is
-  // set to false. This function guarantees that it will succeed only if the
-  // file has not been changed while reading. Must be called on UI thread.
+  // Requests reading contents of a file. |callback| will always run eventually.
+  // It can be called many times, until |has_more| is set to false. This
+  // function guarantees that it will succeed only if the file has not been
+  // changed while reading. Must be called on UI thread.
   void ReadFileOnUIThread(
       scoped_refptr<net::IOBuffer> buffer,
       int64_t offset,
       int length,
       const ProvidedFileSystemInterface::ReadChunkReceivedCallback& callback) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     DCHECK(abort_callback_.is_null());
 
     // If the file system got unmounted, then abort the reading operation.
     if (!file_system_.get()) {
       BrowserThread::PostTask(
           BrowserThread::IO,
           FROM_HERE,
           base::Bind(
               callback, 0, false /* has_more */, base::File::FILE_ERROR_ABORT));
       return;
     }
 
     abort_callback_ = file_system_->ReadFile(
         file_handle_,
         buffer.get(),
         offset,
         length,
         base::Bind(
             &OperationRunner::OnReadFileCompletedOnUIThread, this, callback));
   }
 
-  // Requests metadata of a file. In case of either succes or a failure,
-  // |callback| is executed. Must be called on UI thread.
+  // Requests metadata of a file. |callback| will always run eventually.
+  // Must be called on UI thread.
   void GetMetadataOnUIThread(
       const ProvidedFileSystemInterface::GetMetadataCallback& callback) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
     DCHECK(abort_callback_.is_null());
 
     // If the file system got unmounted, then abort the get length operation.
     if (!file_system_.get()) {
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           base::Bind(callback,
@@ skipping 363 matching lines @@
     callback.Run(net::ERR_UPLOAD_FILE_CHANGED);
     return;
   }
 
   DCHECK_EQ(base::File::FILE_OK, result);
   callback.Run(*metadata->size);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos