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

extensions/common/host_id.h

Index: extensions/common/host_id.h
diff --git a/extensions/common/host_id.h b/extensions/common/host_id.h
index 004480704f07766662006c7c3c570883c7e9a296..d977a44243d252e44527e68aae5ab581de3acd24 100644
--- a/extensions/common/host_id.h
+++ b/extensions/common/host_id.h
@@ -12,17 +12,13 @@
 struct HostID {
   enum HostType { EXTENSIONS, WEBUI };
 
-  HostID() {}
-  HostID(HostType type, const std::string& id)
-      : type_(type), id_(id) {}
-
-  bool 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;
-  }
+  HostID();
+  HostID(HostType type, const std::string& id);
+  HostID(const HostID& host_id);
+  ~HostID();
+
+  bool operator<(const HostID& host_id) const;
+  bool operator==(const HostID& host_id) const;
 
   HostType type() const { return type_; }
   const std::string& id() const { return id_; }