Move PermissionRequestID to chrome/browser/permissions/.

chrome/browser/permissions/permission_request_id.h

Index: chrome/browser/permissions/permission_request_id.h
diff --git a/chrome/browser/permissions/permission_request_id.h b/chrome/browser/permissions/permission_request_id.h
new file mode 100644
index 0000000000000000000000000000000000000000..4b567a7a78cca542134725e6187955ace1bfacf2
--- /dev/null
+++ b/chrome/browser/permissions/permission_request_id.h
@@ -0,0 +1,48 @@
+// 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 CHROME_BROWSER_PERMISSIONS_PERMISSION_REQUEST_ID_H_
+#define CHROME_BROWSER_PERMISSIONS_PERMISSION_REQUEST_ID_H_
+
+#include <string>
+
+#include "url/gurl.h"
+
+// Uniquely identifies a particular permission request.
+// None of the different attribute (render_process_id, render_frame_id,
+// request_id or origin) is enough to compare two requests. In order to check if
+// a request is the same as another one, consumers of this class should use
+// the operator== or operator!=.
+class PermissionRequestID {
+ public:
+  PermissionRequestID(int render_process_id,
+                      int render_frame_id,
+                      int request_id,
+                      const GURL& origin);
+  ~PermissionRequestID();
+
+  PermissionRequestID(const PermissionRequestID&) = default;
+  PermissionRequestID& operator=(const PermissionRequestID&) = default;
+
+  int render_process_id() const { return render_process_id_; }
+  int render_frame_id() const { return render_frame_id_; }
+  int request_id() const { return request_id_; }
+  GURL origin() const { return origin_; }
+
+  bool operator==(const PermissionRequestID& other) const;
+  bool operator!=(const PermissionRequestID& other) const;
+
+  std::string ToString() const;
+
+ private:
+  int render_process_id_;
+  int render_frame_id_;
+  int request_id_;
+
+  // Needed for permission checks that are based on origin. It can be an empty
+  // GURL is the request isn't checking origin.
+  GURL origin_;
+};
+
+#endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_REQUEST_ID_H_