Move xfa/src up to xfa/.

This CL moves the xfa/src files up to the xfa/ directory and fixes the includes,
include guards, and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1803723002 .
diff --git a/xfa/fxbarcode/qrcode/BC_QRCodeWriter.cpp b/xfa/fxbarcode/qrcode/BC_QRCodeWriter.cpp
new file mode 100644
index 0000000..cd4340e
--- /dev/null
+++ b/xfa/fxbarcode/qrcode/BC_QRCodeWriter.cpp
@@ -0,0 +1,107 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+// Original code is licensed as follows:
+/*
+ * Copyright 2008 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "xfa/fxbarcode/BC_Reader.h"
+#include "xfa/fxbarcode/BC_TwoDimWriter.h"
+#include "xfa/fxbarcode/common/BC_CommonByteMatrix.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCodeReader.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCodeWriter.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCoder.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCoderEncoder.h"
+#include "xfa/fxbarcode/qrcode/BC_QRCoderErrorCorrectionLevel.h"
+
+CBC_QRCodeWriter::CBC_QRCodeWriter() {
+  m_bFixedSize = TRUE;
+  m_iCorrectLevel = 1;
+  m_iVersion = 0;
+}
+CBC_QRCodeWriter::~CBC_QRCodeWriter() {}
+void CBC_QRCodeWriter::ReleaseAll() {
+  CBC_QRCodeReader::ReleaseAll();
+}
+FX_BOOL CBC_QRCodeWriter::SetVersion(int32_t version) {
+  if (version < 0 || version > 40) {
+    return FALSE;
+  }
+  m_iVersion = version;
+  return TRUE;
+}
+FX_BOOL CBC_QRCodeWriter::SetErrorCorrectionLevel(int32_t level) {
+  if (level < 0 || level > 3) {
+    return FALSE;
+  }
+  m_iCorrectLevel = level;
+  return TRUE;
+}
+uint8_t* CBC_QRCodeWriter::Encode(const CFX_WideString& contents,
+                                  int32_t ecLevel,
+                                  int32_t& outWidth,
+                                  int32_t& outHeight,
+                                  int32_t& e) {
+  CBC_QRCoderErrorCorrectionLevel* ec = NULL;
+  switch (ecLevel) {
+    case 0:
+      ec = CBC_QRCoderErrorCorrectionLevel::L;
+      break;
+    case 1:
+      ec = CBC_QRCoderErrorCorrectionLevel::M;
+      break;
+    case 2:
+      ec = CBC_QRCoderErrorCorrectionLevel::Q;
+      break;
+    case 3:
+      ec = CBC_QRCoderErrorCorrectionLevel::H;
+      break;
+    default: {
+      e = BCExceptionUnSupportEclevel;
+      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    }
+  }
+  CBC_QRCoder qr;
+  if (m_iVersion > 0 && m_iVersion < 41) {
+    CFX_ByteString byteStr = contents.UTF8Encode();
+    CBC_QRCoderEncoder::Encode(byteStr, ec, &qr, e, m_iVersion);
+  } else {
+    CBC_QRCoderEncoder::Encode(contents, ec, &qr, e);
+  }
+  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  outWidth = qr.GetMatrixWidth();
+  outHeight = qr.GetMatrixWidth();
+  uint8_t* result = FX_Alloc2D(uint8_t, outWidth, outHeight);
+  FXSYS_memcpy(result, qr.GetMatrix()->GetArray(), outWidth * outHeight);
+  return result;
+}
+uint8_t* CBC_QRCodeWriter::Encode(const CFX_ByteString& contents,
+                                  BCFORMAT format,
+                                  int32_t& outWidth,
+                                  int32_t& outHeight,
+                                  int32_t hints,
+                                  int32_t& e) {
+  return NULL;
+}
+uint8_t* CBC_QRCodeWriter::Encode(const CFX_ByteString& contents,
+                                  BCFORMAT format,
+                                  int32_t& outWidth,
+                                  int32_t& outHeight,
+                                  int32_t& e) {
+  return NULL;
+}