Revert of Make CapabilityFilter be part of Identity

mojo/shell/identity.h

 // 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.
 
 #ifndef MOJO_SHELL_IDENTITY_H_
 #define MOJO_SHELL_IDENTITY_H_
 
-#include "mojo/shell/capability_filter.h"
 #include "url/gurl.h"
 
 namespace mojo {
 namespace shell {
 
 // Represents the identity of an application.
 // |url| is the URL of the application.
 // |qualifier| is a string that allows to tie a specific instance of an
 // application to another. A typical use case of qualifier is to control process
 // grouping for a given application URL. For example, the core services are
 // grouped into "Core"/"Files"/"Network"/etc. using qualifier; content handler's
 // qualifier is derived from the origin of the content.
-class Identity {
- public:
+struct Identity {
   Identity();
+  Identity(const GURL& in_url, const std::string& in_qualifier);
   explicit Identity(const GURL& in_url);
-  Identity(const GURL& in_url, const std::string& in_qualifier);
-  Identity(const GURL& in_url,
-           const std::string& in_qualifier,
-           CapabilityFilter filter);
-  ~Identity();
 
   bool operator<(const Identity& other) const;
-  bool is_null() const { return url_.is_empty(); }
+  bool is_null() const { return url.is_empty(); }
 
-  const GURL& url() const { return url_; }
-  const std::string& qualifier() const { return qualifier_; }
-  const CapabilityFilter& filter() const { return filter_; }
-
- private:
-  GURL url_;
-  std::string qualifier_;
-
-  // TODO(beng): CapabilityFilter is not currently included in equivalence
-  //             checks for Identity since we're not currently clear on the
-  //             policy for instance disambiguation. Need to figure this out.
-  //             This field is supplied because it is logically part of the
-  //             instance identity of an application.
-  CapabilityFilter filter_;
+  GURL url;
+  std::string qualifier;
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_IDENTITY_H_