Refactoring: de-couple Extensions from "script injection System" [render side] : 1

extensions/common/host_id.cc

Index: extensions/common/host_id.cc
diff --git a/extensions/common/host_id.cc b/extensions/common/host_id.cc
new file mode 100644
index 0000000000000000000000000000000000000000..121e8e412b7c047d1e4568573b9ffe6ba437837f
--- /dev/null
+++ b/extensions/common/host_id.cc
@@ -0,0 +1,32 @@
+// Copyright 2015 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 "extensions/common/host_id.h"
+
+HostID::HostID() {
+}
+
+HostID::HostID(HostType type, const std::string& id)
+    : type_(type), id_(id) {
+}
+
+HostID::HostID(const HostID& host_id)
+    : type_(host_id.type()),
+      id_(host_id.id()) {
+}
+
+HostID::~HostID() {
+}
+
+bool HostID::operator<(const HostID& host_id) const {
+  if (type_ != host_id.type())
+    return type_ < host_id.type();
+  else if (id_ != host_id.id())
+    return id_ < host_id.id();
+  return false;
+}
+
+bool HostID::operator==(const HostID& host_id) const {
+  return type_ == host_id.type() && id_ == host_id.id();
+}