[fsp] Add an initial AsyncFileUtil.

chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.h

Index: chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.h
diff --git a/chrome/browser/chromeos/drive/fileapi/async_file_util.h b/chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.h
similarity index 64%
copy from chrome/browser/chromeos/drive/fileapi/async_file_util.h
copy to chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.h
index 607758b0ffb69864028add5a7b64cffd984e0ddb..a60df564089d5181ebc19b36f0b6db0e78567d57 100644
--- a/chrome/browser/chromeos/drive/fileapi/async_file_util.h
+++ b/chrome/browser/chromeos/file_system_provider/fileapi/provider_async_file_util.h
@@ -2,24 +2,34 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_ASYNC_FILE_UTIL_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_ASYNC_FILE_UTIL_H_
+#ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_PROVIDER_ASYNC_FILE_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_PROVIDER_ASYNC_FILE_UTIL_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "webkit/browser/fileapi/async_file_util.h"
 
-namespace drive {
+namespace chromeos {
+namespace file_system_provider {
 
 class FileSystemInterface;
 
 namespace internal {
 
-// The implementation of fileapi::AsyncFileUtil for Drive File System.
-class AsyncFileUtil : public fileapi::AsyncFileUtil {
+// The implementation of fileapi::AsyncFileUtil for provided file systems. It is
+// created one per Chrome process. It is responsible for routing calls to the
+// correct profile, and then to the correct profided file system.
+//
+// This class should be called AsyncFileUtil, without the Provided prefix. This
+// is impossible, though because of GYP limitations. There must not be two files
+// with the same name in a Chromium tree.
+// See: https://code.google.com/p/gyp/issues/detail?id=384
+//
+// All of the methods should be called on the IO thread.
+class ProviderAsyncFileUtil : public fileapi::AsyncFileUtil {
  public:
-  AsyncFileUtil();
-  virtual ~AsyncFileUtil();
+  ProviderAsyncFileUtil();
+  virtual ~ProviderAsyncFileUtil();
 
   // fileapi::AsyncFileUtil overrides.
   virtual void CreateOrOpen(
@@ -45,17 +55,15 @@ class AsyncFileUtil : public fileapi::AsyncFileUtil {
       scoped_ptr<fileapi::FileSystemOperationContext> context,
       const fileapi::FileSystemURL& url,
       const ReadDirectoryCallback& callback) OVERRIDE;
-  virtual void Touch(
-      scoped_ptr<fileapi::FileSystemOperationContext> context,
-      const fileapi::FileSystemURL& url,
-      const base::Time& last_access_time,
-      const base::Time& last_modified_time,
-      const StatusCallback& callback) OVERRIDE;
-  virtual void Truncate(
-      scoped_ptr<fileapi::FileSystemOperationContext> context,
-      const fileapi::FileSystemURL& url,
-      int64 length,
-      const StatusCallback& callback) OVERRIDE;
+  virtual void Touch(scoped_ptr<fileapi::FileSystemOperationContext> context,
+                     const fileapi::FileSystemURL& url,
+                     const base::Time& last_access_time,
+                     const base::Time& last_modified_time,
+                     const StatusCallback& callback) OVERRIDE;
+  virtual void Truncate(scoped_ptr<fileapi::FileSystemOperationContext> context,
+                        const fileapi::FileSystemURL& url,
+                        int64 length,
+                        const StatusCallback& callback) OVERRIDE;
   virtual void CopyFileLocal(
       scoped_ptr<fileapi::FileSystemOperationContext> context,
       const fileapi::FileSystemURL& src_url,
@@ -92,10 +100,11 @@ class AsyncFileUtil : public fileapi::AsyncFileUtil {
       const CreateSnapshotFileCallback& callback) OVERRIDE;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(AsyncFileUtil);
+  DISALLOW_COPY_AND_ASSIGN(ProviderAsyncFileUtil);
 };
 
 }  // namespace internal
-}  // namespace drive
+}  // namespace file_system_provider
+}  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_ASYNC_FILE_UTIL_H_
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_PROVIDER_ASYNC_FILE_UTIL_H_