mediaview: Implement ArcDocumentsProviderBackendDelegate.

chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util_unittest.cc

 // Copyright 2016 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 "base/files/file_path.h"
 #include "chrome/browser/chromeos/arc/fileapi/arc_documents_provider_util.h"
 #include "storage/browser/fileapi/file_system_url.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
@@ skipping 116 matching lines @@
       storage::FileSystemURL::CreateForTest(
           GURL(), storage::kFileSystemTypeArcDocumentsProvider,
           base::FilePath(
               "/special/arc-documents-provider/cats/root/home/みけねこ.jpg")),
       &authority, &root_document_id, &path));
   EXPECT_EQ("cats", authority);
   EXPECT_EQ("root", root_document_id);
   EXPECT_EQ(FILE_PATH_LITERAL("home/みけねこ.jpg"), path.value());
 }
 
+TEST(ArcDocumentsProviderUtilTest, BuildDocumentUrl) {
+  EXPECT_EQ("content://Cat%20Provider/document/C%2B%2B",
+            BuildDocumentUrl("Cat Provider", "C++").spec());
+}
+
 }  // namespace
 
 }  // namespace arc