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

ios/web/public/test/earl_grey/web_view_actions.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 "ios/web/public/test/earl_grey/web_view_actions.h"
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #import "base/mac/bind_objc_block.h"
 #include "base/strings/stringprintf.h"
 #import "base/test/ios/wait_util.h"
 #include "base/values.h"
 #import "ios/testing/wait_util.h"
 #import "ios/web/public/test/earl_grey/web_view_matchers.h"
 #import "ios/web/public/test/web_view_interaction_test_util.h"
 #import "ios/web/web_state/web_state_impl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using web::test::ExecuteJavaScript;
 
 namespace {
 
 // Long press duration to trigger context menu.
 const NSTimeInterval kContextMenuLongPressDuration = 0.3;
 
 // Duration to wait for verification of JavaScript action.
 // TODO(crbug.com/670910): Reduce duration if the time required for verification
 // is reduced on devices.
@@ skipping 55 matching lines @@
           }
         }
         return false;
       });
 
   if (!success)
     return false;
 
   // The callback doesn't care about any of the parameters, just whether it is
   // called or not.
-  auto callback = base::BindBlock(^bool(const base::DictionaryValue& /* json */,
-                                        const GURL& /* origin_url */,
-                                        bool /* user_is_interacting */) {
-    *verified = true;
-    return true;
-  });
+  auto callback = base::BindBlockArc(
+      ^bool(const base::DictionaryValue& /* json */,
+            const GURL& /* origin_url */, bool /* user_is_interacting */) {
+        *verified = true;
+        return true;
+      });
 
   static_cast<web::WebStateImpl*>(web_state)->AddScriptCommandCallback(
       callback, kCallbackPrefix);
   return true;
 }
 
 // Removes the injected callback.
 void RemoveVerifierForElementWithId(web::WebState* web_state,
                                     const std::string& element_id) {
   static_cast<web::WebStateImpl*>(web_state)->RemoveScriptCommandCallback(
@@ skipping 109 matching lines @@
 id<GREYAction> WebViewTapElement(WebState* state,
                                  const std::string& element_id) {
   CGRect rect = web::test::GetBoundingRectOfElementWithId(state, element_id);
   CGPoint point = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
   return CGRectIsEmpty(rect) ? WebViewElementNotFound(element_id)
                              : WebViewVerifiedActionOnElement(
                                    state, grey_tapAtPoint(point), element_id);
 }
 
 }  // namespace web