Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/metrics/size_class_recorder_private.h

Index: ios/chrome/browser/metrics/size_class_recorder_private.h
diff --git a/ios/chrome/browser/metrics/size_class_recorder_private.h b/ios/chrome/browser/metrics/size_class_recorder_private.h
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index 0000000000000000000000000000000000000000..d9ef5ff96ea850d3f0ac30ffd58bd78eaae2cbc4
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+++ b/ios/chrome/browser/metrics/size_class_recorder_private.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_BROWSER_METRICS_SIZE_CLASS_RECORDER_PRIVATE_H_
+#define IOS_CHROME_BROWSER_METRICS_SIZE_CLASS_RECORDER_PRIVATE_H_
+
+namespace ios_internal {
+
+// Reported size classes.
+enum SizeClassForReporting {
+  UNSPECIFIED = 0,
+  COMPACT,
+  REGULAR,
+  // NOTE: add new size classes above this line.
+  COUNT
+};
+
+// Converts a UIKit size class to a size class for reporting.
+extern SizeClassForReporting SizeClassForReportingForUIUserInterfaceSizeClass(
+    UIUserInterfaceSizeClass sizeClass);
+
+}  // namespace ios_internal
+
+#endif  // IOS_CHROME_BROWSER_METRICS_SIZE_CLASS_RECORDER_PRIVATE_H_