[iOS Clean] Wired up ContextMenuCommands.

ios/clean/chrome/browser/ui/context_menu/context_menu_context_impl.h

+// 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_CLEAN_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_CONTEXT_IMPL_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_CONTEXT_IMPL_H_
+
+#include "base/strings/string16.h"
+#import "ios/clean/chrome/browser/ui/context_menu/context_menu_context.h"
+
+namespace web {
+struct ContextMenuParams;
+}
+
+class GURL;
+
+// Context object used to populate the context menu UI and to handle commands
+// from that UI.
+@interface ContextMenuContextImpl : ContextMenuContext

[edchin, 2017/05/25 21:41:53]

The pseudo abstract base class and "Impl" seem more Java idiomatic to me. 
I'll followup in person to learn more about what this achieves. 

[kkhorimoto, 2017/05/26 23:20:09]

Acknowledged.

+
+// ContextMenuContextImpls must be initialized with |params|.
+- (instancetype)initWithParams:(const web::ContextMenuParams&)params
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+// The title to use for the menu.
+@property(nonatomic, readonly) NSString* menuTitle;

[edchin, 2017/05/25 21:41:53]

Are memory attributes not necessary here?

[kkhorimoto, 2017/05/26 23:20:09]

The memory is manually managed (just passing through to the title in |params|,
which is owned by a scoped NSObject).  The annotations don't actually make a
difference if you're implementing them yourself, but I'll add strong regardless,
since this object does retain a strong reference through the params.

[edchin, 2017/05/27 15:59:03]

You're right, it's readonly and you override the accessor. 

+
+// If the context menu was triggered by long-pressing a link, |linkURL| will be
+// that link's URL.
+@property(nonatomic, readonly) const GURL& linkURL;
+
+// If the context menu was triggered by long-pressing an image, |imageURL| will
+// be the URL for that image.
+@property(nonatomic, readonly) const GURL& imageURL;
+
+// If the context menu was triggered by long-pressing a JavaScript link,
+// |script| will be the script for that link.
+@property(nonatomic, readonly) const base::string16& script;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_CONTEXT_MENU_CONTEXT_MENU_CONTEXT_IMPL_H_