net: Fix a regression that broke file uploading with http authentication

net/base/upload_data_stream_unittest.cc

Index: net/base/upload_data_stream_unittest.cc
diff --git a/net/base/upload_data_stream_unittest.cc b/net/base/upload_data_stream_unittest.cc
index 078f2007bbece58a34bff7c790a2ed4a2ae0fd68..2715e73d18d04e1bb03a53159a183fdca0d818c0 100644
--- a/net/base/upload_data_stream_unittest.cc
+++ b/net/base/upload_data_stream_unittest.cc
@@ -27,6 +27,17 @@ const char kTestData[] = "0123456789";
 const size_t kTestDataSize = arraysize(kTestData) - 1;
 const size_t kTestBufferSize = 1 << 14;  // 16KB.
 
+// Reads data from the upload data stream, and returns the data as string.
+std::string ReadFromUploadDataStream(UploadDataStream* stream) {
+  std::string data_read;
+  scoped_refptr<IOBuffer> buf = new IOBuffer(kTestBufferSize);
+  while (!stream->IsEOF()) {
+    const int bytes_read = stream->Read(buf, kTestBufferSize);
+    data_read.append(buf->data(), bytes_read);
+  }
+  return data_read;
+}
+
 }  // namespace
 
 class UploadDataStreamTest : public PlatformTest {
@@ -144,4 +155,36 @@ TEST_F(UploadDataStreamTest, FileChanged) {
   file_util::Delete(temp_file_path, false);
 }
 
+TEST_F(UploadDataStreamTest, UploadDataReused) {
+  FilePath temp_file_path;
+  ASSERT_TRUE(file_util::CreateTemporaryFile(&temp_file_path));
+  ASSERT_EQ(static_cast<int>(kTestDataSize),
+            file_util::WriteFile(temp_file_path, kTestData, kTestDataSize));
+
+  // Prepare |upload_data_| that contains a file.
+  std::vector<UploadData::Element> elements;
+  UploadData::Element element;
+  element.SetToFilePath(temp_file_path);
+  elements.push_back(element);
+  upload_data_->SetElements(elements);
+  EXPECT_EQ(kTestDataSize, upload_data_->GetContentLengthSync());
+
+  // Confirm that the file is read properly.
+  {
+    UploadDataStream stream(upload_data_);
+    ASSERT_EQ(OK, stream.Init());
+    EXPECT_EQ(kTestData, ReadFromUploadDataStream(&stream));
+  }
+
+  // Reuse |upload_data_| for another UploadDataStream, and confirm that the
+  // file is read properly.
+  {
+    UploadDataStream stream(upload_data_);
+    ASSERT_EQ(OK, stream.Init());
+    EXPECT_EQ(kTestData, ReadFromUploadDataStream(&stream));
+  }
+
+  file_util::Delete(temp_file_path, false);
+}
+
 }  // namespace net