Split file_observers.h into three files for each class

webkit/browser/fileapi/file_system_operation_runner.cc

 // Copyright 2013 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 "webkit/browser/fileapi/file_system_operation_runner.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/stl_util.h"
 #include "net/url_request/url_request_context.h"
 #include "webkit/browser/blob/blob_url_request_job_factory.h"
-#include "webkit/browser/fileapi/file_observers.h"
+#include "webkit/browser/fileapi/file_access_observer.h"
 #include "webkit/browser/fileapi/file_stream_writer.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_operation.h"
+#include "webkit/browser/fileapi/file_update_observer.h"
 #include "webkit/browser/fileapi/file_writer_delegate.h"
 #include "webkit/common/blob/shareable_file_reference.h"
 
 namespace fileapi {
 
 typedef FileSystemOperationRunner::OperationID OperationID;
 
 class FileSystemOperationRunner::BeginOperationScoper
     : public base::SupportsWeakPtr<
           FileSystemOperationRunner::BeginOperationScoper> {
@@ skipping 654 matching lines @@
       stray_cancel_callbacks_.find(id);
   if (found_cancel != stray_cancel_callbacks_.end()) {
     // This cancel has been requested after the operation has finished,
     // so report that we failed to stop it.
     found_cancel->second.Run(base::PLATFORM_FILE_ERROR_INVALID_OPERATION);
     stray_cancel_callbacks_.erase(found_cancel);
   }
 }
 
 }  // namespace fileapi