Port Android relocation packer to chromium build

third_party/android_platform/relocation_packer/src/packer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Pack relative relocations into a more compact form.
 //
 //
 // For relative relocations without addends (32 bit platforms)
 // -----------------------------------------------------------
 //
@@ skipping 30 matching lines @@
 //   "APA1"   pairs  offset_d1 addend_d1 offset_d2 addend_d2 ...
 //   41505232 f2b018 04        28        08        9f01      ...
 
 #ifndef TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
 #define TOOLS_RELOCATION_PACKER_SRC_PACKER_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "elf.h"
-#include "elf_traits.h"
 
 namespace relocation_packer {
 
-// A RelocationPacker packs vectors of relative relocations into more
+// A RelocationPacker packs vectors of relocations into more
 // compact forms, and unpacks them to reproduce the pre-packed data.
+template <typename ELF>
 class RelocationPacker {
  public:
-  // Pack relative relocations into a more compact form.
-  // |relocations| is a vector of relative relocation structs.
+  // Pack relocations into a more compact form.
+  // |relocations| is a vector of relocation structs.
   // |packed| is the vector of packed bytes into which relocations are packed.
-  static void PackRelativeRelocations(const std::vector<ELF::Rel>& relocations,
-                                      std::vector<uint8_t>* packed);
-  static void PackRelativeRelocations(const std::vector<ELF::Rela>& relocations,
-                                      std::vector<uint8_t>* packed);
+  static void PackRelocations(const std::vector<typename ELF::Rela>& relocations,
+                              std::vector<uint8_t>* packed);
 
-  // Unpack relative relocations from their more compact form.
+  // Unpack relocations from their more compact form.
   // |packed| is the vector of packed relocations.
-  // |relocations| is a vector of unpacked relative relocation structs.
-  static void UnpackRelativeRelocations(const std::vector<uint8_t>& packed,
-                                        std::vector<ELF::Rel>* relocations);
-  static void UnpackRelativeRelocations(const std::vector<uint8_t>& packed,
-                                        std::vector<ELF::Rela>* relocations);
+  // |relocations| is a vector of unpacked relocation structs.
+  static void UnpackRelocations(const std::vector<uint8_t>& packed,
+                                std::vector<typename ELF::Rela>* relocations);
 };
 
 }  // namespace relocation_packer
 
 #endif  // TOOLS_RELOCATION_PACKER_SRC_PACKER_H_