Refactor rel32 searching process for x64 to make it more similar to x86.

courgette/rel32_finder.cc

+// Copyright 2016 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.
+
+#include "courgette/rel32_finder.h"
+
+namespace courgette {
+
+Rel32Finder::Rel32Finder(RVA relocs_start_rva, RVA relocs_end_rva)
+    : relocs_start_rva_(relocs_start_rva), relocs_end_rva_(relocs_end_rva) {}
+
+void Rel32Finder::SwapRel32Locations(std::vector<RVA>* dest) {
+  dest->swap(rel32_locations_);
+}
+
+#if COURGETTE_HISTOGRAM_TARGETS
+void Rel32FinderX86::SwapRel32TargetRVAs(std::map<RVA, int>* dest) {
+  dest->swap(rel32_target_rvas_);
+}
+#endif
+
+}  // namespace courgette