Revert 123864 - Adding CreateSnapshotFile interface to FileSystemOperationInterface

To allow each filesystem implementation to prepare a local snapshot file
for File object.

BUG=115603
TEST=none

Review URL: https://chromiumcodereview.appspot.com/9462005

TBR=kinuko@chromium.org

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@123873 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 45 deletions

diff --git a/webkit/fileapi/file_system_operation_interface.h b/webkit/fileapi/file_system_operation_interface.h
index 6777f34..fe8ac4d 100644
--- a/webkit/fileapi/file_system_operation_interface.h
+++ b/webkit/fileapi/file_system_operation_interface.h
@@ -8,7 +8,6 @@
 #include "base/file_util_proxy.h"
 #include "base/platform_file.h"
 #include "base/process.h"
-#include "webkit/blob/deletable_file_reference.h"
 
 namespace base {
 class Time;
@@ -19,10 +18,6 @@ class URLRequest;
 class URLRequestContext;
 }  // namespace net
 
-namespace webkit_blob {
-class DeletableFileReference;
-}
-
 class GURL;
 
 namespace fileapi {
@@ -79,35 +74,6 @@ class FileSystemOperationInterface {
       const std::vector<base::FileUtilProxy::Entry>& file_list,
       bool has_more)> ReadDirectoryCallback;
 
-  // Used for CreateSnapshotFile(). (Please see the comment at
-  // CreateSnapshotFile() below for how the method is called)
-  // |result| is the return code of the operation.
-  // |file_info| is the metadata of the snapshot file created.
-  // |platform_path| is the path to the snapshot file created.
-  //
-  // The snapshot file could simply be of the local file pointed by the given
-  // filesystem URL in local filesystem cases; remote filesystems
-  // may want to download the file into a temporary snapshot file and then
-  // return the metadata of the temporary file.
-  //
-  // |deletable_file_ref| is used to manage the lifetime of the returned
-  // snapshot file.  It can be set to let the chromium backend take
-  // care of the life time of the snapshot file.  Otherwise (if the returned
-  // file is not a temporary file to be deleted) the implementation can just
-  // return NULL.  In a more complex case, the implementaiton can manage
-  // the lifetime of the snapshot file on its own (e.g. by its cache system)
-  // but also can be notified via the reference when the file becomes no
-  // longer necessary in the javascript world.
-  // Please see the comment for DeletableFileReference for details.
-  //
-  typedef base::Callback<void(
-      base::PlatformFileError result,
-      const base::PlatformFileInfo& file_info,
-      const FilePath& platform_path,
-      const scoped_refptr<webkit_blob::DeletableFileReference>&
-          deletable_file_ref
-      )> SnapshotFileCallback;
-
   // Used for Write().
   typedef base::Callback<void(base::PlatformFileError result,
                               int64 bytes,
@@ -229,17 +195,6 @@ class FileSystemOperationInterface {
   // handling based on element types is supported.
   virtual FileSystemOperation* AsFileSystemOperation() = 0;
 
-  // Creates a local snapshot file for a given |path| and returns the
-  // metadata and platform path of the snapshot file via |callback|.
-  // In local filesystem cases the implementation may simply return
-  // the metadata of the file itself (as well as GetMetadata does),
-  // while in remote filesystem case the backend may want to download the file
-  // into a temporary snapshot file and return the metadata of the
-  // temporary file.  Or if the implementaiton already has the local cache
-  // data for |path| it can simply return the path to the cache.
-  virtual void CreateSnapshotFile(const GURL& path,
-                                  const SnapshotFileCallback& callback) = 0;
-
  protected:
   // Used only for internal assertions.
   enum OperationType {