Add Category wrapper for ContentSuggestions on iOS

ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h

Index: ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h
diff --git a/ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h b/ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h
new file mode 100644
index 0000000000000000000000000000000000000000..77d32522d40bb71b0df76df0c7489b6a79461910
--- /dev/null
+++ b/ios/chrome/browser/content_suggestions/content_suggestions_category_wrapper.h
@@ -0,0 +1,23 @@
+// Copyright 2017 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_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_CATEGORY_WRAPPER_H_
+#define IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_CATEGORY_WRAPPER_H_
+
+#import <Foundation/Foundation.h>
+
+#include "components/ntp_snippets/category.h"
+
+// Objective-C wrapper for ntp_snippets::Category.
+@interface ContentSuggestionsCategoryWrapper : NSObject<NSCopying>
+
+- (instancetype)initWithCategory:(ntp_snippets::Category)category
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+@property(nonatomic, assign, readonly) ntp_snippets::Category category;

[stkhapugin, 2017/02/13 12:19:18]

This is not a property, you create a new object every time. Use a getter
instead. I think you can still use dot notation in this case. 

[gambard, 2017/02/13 14:51:41]

Done.

+
+@end
+
+#endif  // IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_CATEGORY_WRAPPER_H_