Rename ResourcePathShortener to Obfuscator

ResourcePathShortener is a part of Obfuscator. Obfuscator will not
only shorten the path but also handle obfuscating resource names.

Format C++ code by clang-format.

Bug: 228192695

Test: atest aapt2_test idmap2_test
Change-Id: I27b4b1af44061e3cd8a6717ffd46b8a187cdc41d
diff --git a/tools/aapt2/optimize/Obfuscator.h b/tools/aapt2/optimize/Obfuscator.h
new file mode 100644
index 0000000..1ea32db
--- /dev/null
+++ b/tools/aapt2/optimize/Obfuscator.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2018 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 TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_
+#define TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_
+
+#include <map>
+#include <string>
+
+#include "android-base/macros.h"
+#include "process/IResourceTableConsumer.h"
+
+namespace aapt {
+
+class ResourceTable;
+
+// Maps resources in the apk to shortened paths.
+class Obfuscator : public IResourceTableConsumer {
+ public:
+  explicit Obfuscator(std::map<std::string, std::string>& path_map_out);
+
+  bool Consume(IAaptContext* context, ResourceTable* table) override;
+
+ private:
+  std::map<std::string, std::string>& path_map_;
+  DISALLOW_COPY_AND_ASSIGN(Obfuscator);
+};
+
+}  // namespace aapt
+
+#endif  // TOOLS_AAPT2_OPTIMIZE_OBFUSCATOR_H_