Fix the hasBackingFile flag for File backed by a file system URL.

Source/core/fileapi/FileTest.cpp

+// 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 "config.h"
+#include "File.h"
+
+#include <gtest/gtest.h>
+
+namespace blink {
+
+TEST(FileTest, nativeFile)
+{
+    File* const file = File::create("/native/path");
+    EXPECT_TRUE(file->hasBackingFile());
+    EXPECT_EQ("/native/path", file->path());
+    EXPECT_TRUE(file->fileSystemURL().isEmpty());
+}
+
+TEST(FileTest, blobBackingFile)
+{
+    const RefPtr<BlobDataHandle> blobDataHandle = BlobDataHandle::create();
+    File* const file = File::create("name", 0.0, blobDataHandle);
+    EXPECT_FALSE(file->hasBackingFile());
+    EXPECT_TRUE(file->path().isEmpty());
+    EXPECT_TRUE(file->fileSystemURL().isEmpty());
+}
+
+TEST(FileTest, fileSystemFileWithNativeSnapshot)
+{
+    FileMetadata metadata;
+    metadata.platformPath = "/native/snapshot";
+    File* const file = File::createForFileSystemFile("name", metadata, File::IsUserVisible);
+    EXPECT_TRUE(file->hasBackingFile());
+    EXPECT_EQ("/native/snapshot", file->path());
+    EXPECT_TRUE(file->fileSystemURL().isEmpty());
+}
+
+TEST(FileTest, fileSystemFileWithoutNativeSnapshot)
+{
+    KURL url(ParsedURLStringTag(), "filesystem:http://example.com/isolated/hash/non-native-file");
+    FileMetadata metadata;
+    File* const file = File::createForFileSystemFile(url, metadata);
+    EXPECT_FALSE(file->hasBackingFile());
+    EXPECT_TRUE(file->path().isEmpty());
+    EXPECT_EQ(url, file->fileSystemURL());
+}
+
+} // namespace blink