[iOS] Upstream physical web classes.

ios/chrome/common/physical_web/physical_web_types.h

Index: ios/chrome/common/physical_web/physical_web_types.h
diff --git a/ios/chrome/common/physical_web/physical_web_types.h b/ios/chrome/common/physical_web/physical_web_types.h
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+++ b/ios/chrome/common/physical_web/physical_web_types.h
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+// 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 IOS_CHROME_COMMON_PHYSICAL_WEB_PHYSICAL_WEB_TYPES_H_
+#define IOS_CHROME_COMMON_PHYSICAL_WEB_PHYSICAL_WEB_TYPES_H_
+
+#import <Foundation/Foundation.h>
+
+@class PhysicalWebDevice;
+
+namespace physical_web {
+
+typedef void (^RequestFinishedBlock)(PhysicalWebDevice*, NSError*);
+
+// Error domain for physical web.
+extern NSString* const kPhysicalWebErrorDomain;
+
+// Error codes for physical web errors.
+enum PhysicalWebErrorCode {
+  // The JSON data returned by the metadata service is invalid.
+  ERROR_INVALID_JSON = 1,
+};
+
+// Maximum value for the rank of a physical web device.
+extern const double kMaxRank;
+
+}  // namespace physical_web
+
+#endif  // IOS_CHROME_COMMON_PHYSICAL_WEB_PHYSICAL_WEB_TYPES_H_