AAPT2: Add Manifest fixing/validation

Change-Id: I7f6d8b74d1c590adc356b4da55cb6cb777cdf1da
diff --git a/tools/aapt2/link/ManifestFixer.h b/tools/aapt2/link/ManifestFixer.h
new file mode 100644
index 0000000..16e161d
--- /dev/null
+++ b/tools/aapt2/link/ManifestFixer.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef AAPT_LINK_MANIFESTFIXER_H
+#define AAPT_LINK_MANIFESTFIXER_H
+
+#include "process/IResourceTableConsumer.h"
+
+namespace aapt {
+
+struct ManifestFixerOptions {
+    Maybe<std::u16string> minSdkVersionDefault;
+    Maybe<std::u16string> targetSdkVersionDefault;
+};
+
+/**
+ * Verifies that the manifest is correctly formed and inserts defaults
+ * where specified with ManifestFixerOptions.
+ */
+struct ManifestFixer : public IXmlResourceConsumer {
+    ManifestFixerOptions mOptions;
+
+    ManifestFixer(const ManifestFixerOptions& options) : mOptions(options) {
+    }
+
+    bool consume(IAaptContext* context, XmlResource* doc) override;
+};
+
+} // namespace aapt
+
+#endif /* AAPT_LINK_MANIFESTFIXER_H */