drive: Show files shared to me from other account's shared folder.

chrome/browser/chromeos/drive/change_list_processor_unittest.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 "chrome/browser/chromeos/drive/change_list_processor.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
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       change_lists.Pass(),
       &file_path));
   EXPECT_EQ(util::GetDriveMyDriveRootPath().value(), file_path.value());
 
   // "new_file" should not be added.
   ResourceEntry entry;
   EXPECT_EQ(FILE_ERROR_NOT_FOUND, metadata_->GetResourceEntryByPath(
       util::GetDriveMyDriveRootPath().AppendASCII(new_file.title()), &entry));
 }
 
+TEST_F(ChangeListProcessorTest, SharedFilesWithNoParentInFeed) {
+  // Prepare metadata.
+  EXPECT_EQ(FILE_ERROR_OK,
+            ApplyFullResourceList(ParseChangeList(kBaseResourceListFile)));
+
+  // Create change lists.
+  ScopedVector<ChangeList> change_lists;
+  change_lists.push_back(new ChangeList);
+
+  // Add a new file with non-existing parent resource id to the change lists.
+  ResourceEntry new_file;
+  new_file.set_title("new_file");
+  new_file.set_resource_id("new_file_id");
+  change_lists[0]->mutable_entries()->push_back(new_file);
+  change_lists[0]->mutable_parent_resource_ids()->push_back("nonexisting");
+  change_lists[0]->set_largest_changestamp(kBaseResourceListChangestamp + 1);
+
+  std::set<base::FilePath> changed_dirs;
+  EXPECT_EQ(FILE_ERROR_OK, ApplyChangeList(change_lists.Pass(), &changed_dirs));
+
+  // "new_file" should be added under drive/other.
+  ResourceEntry entry;
+  EXPECT_EQ(FILE_ERROR_OK, metadata_->GetResourceEntryByPath(
+      util::GetDriveGrandRootPath().AppendASCII("other/new_file"), &entry));
+}
+
 }  // namespace internal
 }  // namespace drive