Support cross-profile copy between Chrome OS Google Drive folders.

chrome/browser/chromeos/drive/fileapi/file_system_backend_delegate.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/drive/fileapi/file_system_backend_delegate.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/fileapi/async_file_util.h"
+#include "chrome/browser/chromeos/drive/fileapi/fileapi_worker.h"
 #include "chrome/browser/chromeos/drive/fileapi/webkit_file_stream_reader_impl.h"
 #include "chrome/browser/chromeos/drive/fileapi/webkit_file_stream_writer_impl.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "webkit/browser/blob/file_stream_reader.h"
 #include "webkit/browser/fileapi/async_file_util.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 
 using content::BrowserThread;
 
 namespace drive {
 
 FileSystemBackendDelegate::FileSystemBackendDelegate(

[kinaba, 2014/02/04 02:48:48]

Probably whole the class can be removed and merged to FileSystemBackend. I'll do
it separately later and concentrate the current patch to switching the profile
source from profile_id_ to url.

     content::BrowserContext* browser_context)

[hashimoto, 2014/02/04 05:44:36]

nit: browser_context and profile_id_ are not needed?

[kinaba, 2014/02/04 06:10:59]

Done.

Not needed and since I thought holding profile_id_ is the whole reason
FileSystemBackendDelegate existed, I'm thinking about removing them all at once
along with the removal of the Delegate class. But I changed my mind that the
class is still giving a separation between general filesystem and Drive
filesystem and hence can be kept. For now, I'll just remove the unneeded fields.

     : profile_id_(Profile::FromBrowserContext(browser_context)),
-      async_file_util_(new internal::AsyncFileUtil(
-          base::Bind(&util::GetFileSystemByProfileId, profile_id_))) {
+      async_file_util_(new internal::AsyncFileUtil) {
   DCHECK(profile_id_);
 }
 
 FileSystemBackendDelegate::~FileSystemBackendDelegate() {
 }
 
 fileapi::AsyncFileUtil* FileSystemBackendDelegate::GetAsyncFileUtil(
     fileapi::FileSystemType type) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK_EQ(fileapi::kFileSystemTypeDrive, type);
   return async_file_util_.get();
 }
 
 scoped_ptr<webkit_blob::FileStreamReader>
 FileSystemBackendDelegate::CreateFileStreamReader(
     const fileapi::FileSystemURL& url,
     int64 offset,
     const base::Time& expected_modification_time,
     fileapi::FileSystemContext* context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK_EQ(fileapi::kFileSystemTypeDrive, url.type());
 
   base::FilePath file_path = util::ExtractDrivePathFromFileSystemUrl(url);
   if (file_path.empty())
     return scoped_ptr<webkit_blob::FileStreamReader>();
 
   return scoped_ptr<webkit_blob::FileStreamReader>(
       new internal::WebkitFileStreamReaderImpl(
-          base::Bind(&util::GetFileSystemByProfileId, profile_id_),
+          base::Bind(&fileapi_internal::GetFileSystemFromUrl, url),
           context->default_file_task_runner(),
           file_path, offset, expected_modification_time));
 }
 
 scoped_ptr<fileapi::FileStreamWriter>
 FileSystemBackendDelegate::CreateFileStreamWriter(
     const fileapi::FileSystemURL& url,
     int64 offset,
     fileapi::FileSystemContext* context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK_EQ(fileapi::kFileSystemTypeDrive, url.type());
 
   base::FilePath file_path = util::ExtractDrivePathFromFileSystemUrl(url);
   // Hosted documents don't support stream writer.
   if (file_path.empty() || util::HasGDocFileExtension(file_path))
     return scoped_ptr<fileapi::FileStreamWriter>();
 
   return scoped_ptr<fileapi::FileStreamWriter>(
       new internal::WebkitFileStreamWriterImpl(
-          base::Bind(&util::GetFileSystemByProfileId, profile_id_),
+          base::Bind(&fileapi_internal::GetFileSystemFromUrl, url),
           context->default_file_task_runner(),file_path, offset));
 }
 
 }  // namespace drive