[ObjC ARC] Converts ios/chrome/browser/ui/omnibox:omnibox_internal to ARC.

ios/chrome/browser/ui/omnibox/location_bar_view_ios.h

 // Copyright (c) 2012 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_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_
 #define IOS_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_
 
 #import <UIKit/UIKit.h>
 
 #include <memory>
@@ skipping 90 matching lines @@
   // Creates the clear text UIButton to be used as a right view of |field_|.
   void CreateClearTextIcon(bool is_incognito);
 
   // Updates the view to show the appropriate button (e.g. clear text or voice
   // search) on the right side of |field_|.
   void UpdateRightDecorations();
 
   bool show_hint_text_;
   base::scoped_nsobject<UIButton> clear_text_button_;
   std::unique_ptr<OmniboxViewIOS> edit_view_;
   base::scoped_nsobject<OmniboxClearButtonBridge> clear_button_bridge_;

[rohitrao (ping after 24h), 2017/02/24 13:40:31]

We have to use scoped_nsobject here, because it's in a header?

[stkhapugin, 2017/03/01 17:43:58]

yes

-  OmniboxTextFieldIOS* field_;
-  id<LocationBarDelegate> delegate_;
+  __unsafe_unretained OmniboxTextFieldIOS*
+      field_;  // Should be __weak but is included from non-ARC code.

[rohitrao (ping after 24h), 2017/02/24 13:40:31]

Nit: if you move the comment to be on the line above these variables,
clang-format won't line break in a weird way.

[stkhapugin, 2017/03/01 17:43:58]

Done.

+  __unsafe_unretained id<LocationBarDelegate>
+      delegate_;  // Should be __weak but is included from non-ARC code.
   bool is_showing_placeholder_while_collapsed_;
 };
 
 #endif  // IOS_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_VIEW_IOS_H_