[ObjC ARC] Converts ios/web:web to ARC.

ios/web/web_state/web_view_internal_creation_util.mm

 // Copyright 2014 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/web/web_state/web_view_internal_creation_util.h"
 
 #import <objc/runtime.h>
 
 #include "base/logging.h"
-#import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/public/web_client.h"
 #import "ios/web/web_state/ui/crw_context_menu_controller.h"
 #import "ios/web/web_state/ui/wk_web_view_configuration_provider.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace web {
 
 namespace {
 
 // Verifies the preconditions for creating a WKWebView. Must be called before
 // a WKWebView is allocated. Not verifying the preconditions before creating
 // a WKWebView will lead to undefined behavior.
 void VerifyWKWebViewCreationPreConditions(
     BrowserState* browser_state,
     WKWebViewConfiguration* configuration) {
@@ skipping 27 matching lines @@
   // reasonable value.
   web_view.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
 
   // Starting in iOS10, |allowsLinkPreview| defaults to YES.  This should be
   // disabled since the default implementation will open the link in Safari.
   // TODO(crbug.com/622746): Remove once web// link preview implementation is
   // created.
   web_view.allowsLinkPreview = NO;
 
   if (context_menu_delegate) {
-    base::scoped_nsobject<CRWContextMenuController> context_menu_controller(
-        [[CRWContextMenuController alloc]
-               initWithWebView:web_view
-            injectionEvaluator:nil
-                      delegate:context_menu_delegate]);
-    objc_setAssociatedObject(web_view, context_menu_controller.get(),
-                             context_menu_controller.get(),
+    CRWContextMenuController* context_menu_controller = [
+        [CRWContextMenuController alloc] initWithWebView:web_view
+                                      injectionEvaluator:nil
+                                                delegate:context_menu_delegate];
+    void* associatedObjectKey = (__bridge void*)context_menu_controller;

[Eugene But (OOO till 7-30), 2017/06/14 01:27:59]

Sorry, missed in the previous round
s/associatedObjectKey/associated_object_key

[PL, 2017/06/15 22:51:32]

Done! Sorry, old habits!

+    objc_setAssociatedObject(web_view, associatedObjectKey,
+                             context_menu_controller,
                              OBJC_ASSOCIATION_RETAIN_NONATOMIC);
   }
 
-  return [web_view autorelease];
+  return web_view;
 }
 
 WKWebView* BuildWKWebView(CGRect frame,
                           WKWebViewConfiguration* configuration,
                           BrowserState* browser_state,
                           UserAgentType user_agent_type) {
   return BuildWKWebView(frame, configuration, browser_state, user_agent_type,
                         nil);
 }
 
 WKWebView* BuildWKWebView(CGRect frame,
                           WKWebViewConfiguration* configuration,
                           BrowserState* browser_state) {
   return BuildWKWebView(frame, configuration, browser_state,
                         UserAgentType::MOBILE);
 }
 
 }  // namespace web