Creates open_url_util files

ios/chrome/browser/open_url_util.mm

+// Copyright 2016 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 "open_url_util.h"

[Eugene But (OOO till 7-30), 2016/09/14 20:20:07]

Please use full path for the imports

[sczs, 2016/09/15 20:35:47]

Done.

+
+#import <UIKit/UIKit.h>
+
+#include "base/ios/ios_util.h"
+
+void OpenURLWithCompletionHandler(NSURL* url,
+                                  void (^completion_handler)(BOOL success)) {
+  if (base::ios::IsRunningOnIOS10OrLater()) {
+    [[UIApplication sharedApplication] openURL:url
+                                       options:@{}
+                             completionHandler:completion_handler];
+    return;
+  } else {

[Eugene But (OOO till 7-30), 2016/09/14 20:20:07]

NIT: You don't need else here, since you have an early return in the previous
block. Alternatively you can keep |else| and drop |return|.

[sczs, 2016/09/15 20:35:47]

Done.

+    BOOL result = [[UIApplication sharedApplication] openURL:url];
+    if (!completion_handler)
+      return;
+    dispatch_async(dispatch_get_main_queue(), ^{
+      completion_handler(result);
+    });
+  }
+}