Add context menu when long press on a reading list entry

ios/chrome/browser/ui/clipboard_util.mm

Index: ios/chrome/browser/ui/clipboard_util.mm
diff --git a/ios/chrome/browser/ui/clipboard_util.mm b/ios/chrome/browser/ui/clipboard_util.mm
new file mode 100644
index 0000000000000000000000000000000000000000..7f6c816f5fb46c7f9fe8cc6c2668bce0729518aa
--- /dev/null
+++ b/ios/chrome/browser/ui/clipboard_util.mm
@@ -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.
+
+#import "ios/chrome/browser/ui/clipboard_util.h"
+
+#import <MobileCoreServices/MobileCoreServices.h>
+#import <UIKit/UIKit.h>
+
+#include "base/strings/sys_string_conversions.h"
+#import "net/base/mac/url_conversions.h"
+#include "url/gurl.h"
+
+void StoreURLInPasteboard(const GURL& URL) {

[Olivier, 2017/02/01 12:22:05]

nit:
choose pasteboard or clipboard for name of method and file.

[gambard, 2017/02/01 17:13:37]

Done.

+  DCHECK(URL.is_valid());
+  NSData* plainText = [base::SysUTF8ToNSString(URL.spec())
+      dataUsingEncoding:NSUTF8StringEncoding];
+  NSDictionary* copiedItem = @{
+    (NSString*)kUTTypeURL : net::NSURLWithGURL(URL),
+    (NSString*)kUTTypeUTF8PlainText : plainText,
+  };
+  [[UIPasteboard generalPasteboard] setItems:@[ copiedItem ]];
+}