Add a parameter to FileStreamWriter::CreateForLocalFile to allow creating new

content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc

Index: content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc
diff --git a/content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc b/content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc
index 1b7abf9852bcdbe714b4d13091f0d20a6a8d8a59..d5192a815101aed4fe3af345599448e9e26b620a 100644
--- a/content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc
+++ b/content/browser/fileapi/copy_or_move_operation_delegate_unittest.cc
@@ -718,14 +718,11 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelper) {
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   base::FilePath source_path = temp_dir.path().AppendASCII("source");
+  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
   const char kTestData[] = "abcdefghijklmnopqrstuvwxyz0123456789";
   base::WriteFile(source_path, kTestData,
                   arraysize(kTestData) - 1);  // Exclude trailing '\0'.
 
-  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
-  // LocalFileWriter requires the file exists. So create an empty file here.
-  base::WriteFile(dest_path, "", 0);
-
   base::MessageLoopForIO message_loop;
   base::Thread file_thread("file_thread");
   ASSERT_TRUE(file_thread.Start());
@@ -739,8 +736,8 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelper) {
       webkit_blob::FileStreamReader::CreateForLocalFile(
           task_runner.get(), source_path, 0, base::Time()));
 
-  scoped_ptr<FileStreamWriter> writer(
-      FileStreamWriter::CreateForLocalFile(task_runner.get(), dest_path, 0));
+  scoped_ptr<FileStreamWriter> writer(FileStreamWriter::CreateForLocalFile(
+      task_runner.get(), dest_path, 0, FileStreamWriter::CREATE_NEW_FILE));
 
   std::vector<int64> progress;
   CopyOrMoveOperationDelegate::StreamCopyHelper helper(
@@ -776,13 +773,11 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelperWithFlush) {
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   base::FilePath source_path = temp_dir.path().AppendASCII("source");
+  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
   const char kTestData[] = "abcdefghijklmnopqrstuvwxyz0123456789";
   base::WriteFile(source_path, kTestData,
                   arraysize(kTestData) - 1);  // Exclude trailing '\0'.
 
-  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
-  // LocalFileWriter requires the file exists. So create an empty file here.
-  base::WriteFile(dest_path, "", 0);
 
   base::MessageLoopForIO message_loop;
   base::Thread file_thread("file_thread");
@@ -797,8 +792,8 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelperWithFlush) {
       webkit_blob::FileStreamReader::CreateForLocalFile(
           task_runner.get(), source_path, 0, base::Time()));
 
-  scoped_ptr<FileStreamWriter> writer(
-      FileStreamWriter::CreateForLocalFile(task_runner.get(), dest_path, 0));
+  scoped_ptr<FileStreamWriter> writer(FileStreamWriter::CreateForLocalFile(
+      task_runner.get(), dest_path, 0, FileStreamWriter::CREATE_NEW_FILE));
 
   std::vector<int64> progress;
   CopyOrMoveOperationDelegate::StreamCopyHelper helper(
@@ -830,14 +825,11 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelper_Cancel) {
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   base::FilePath source_path = temp_dir.path().AppendASCII("source");
+  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
   const char kTestData[] = "abcdefghijklmnopqrstuvwxyz0123456789";
   base::WriteFile(source_path, kTestData,
                   arraysize(kTestData) - 1);  // Exclude trailing '\0'.
 
-  base::FilePath dest_path = temp_dir.path().AppendASCII("dest");
-  // LocalFileWriter requires the file exists. So create an empty file here.
-  base::WriteFile(dest_path, "", 0);
-
   base::MessageLoopForIO message_loop;
   base::Thread file_thread("file_thread");
   ASSERT_TRUE(file_thread.Start());
@@ -851,8 +843,8 @@ TEST(LocalFileSystemCopyOrMoveOperationTest, StreamCopyHelper_Cancel) {
       webkit_blob::FileStreamReader::CreateForLocalFile(
           task_runner.get(), source_path, 0, base::Time()));
 
-  scoped_ptr<FileStreamWriter> writer(
-      FileStreamWriter::CreateForLocalFile(task_runner.get(), dest_path, 0));
+  scoped_ptr<FileStreamWriter> writer(FileStreamWriter::CreateForLocalFile(
+      task_runner.get(), dest_path, 0, FileStreamWriter::CREATE_NEW_FILE));
 
   std::vector<int64> progress;
   CopyOrMoveOperationDelegate::StreamCopyHelper helper(