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

ios/web/webui/mojo_facade_unittest.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/webui/mojo_facade.h"
 
 #include <memory>
 
-#import "base/mac/scoped_nsobject.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
 #include "ios/web/public/test/web_test.h"
 #import "ios/web/public/web_state/js/crw_js_injection_evaluator.h"
 #include "ios/web/public/web_state/web_state_interface_provider.h"
 #include "ios/web/test/mojo_test.mojom.h"
 #include "ios/web/web_state/web_state_impl.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/service_manager/public/cpp/bind_source_info.h"
 #import "testing/gtest_mac.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace web {
 
 namespace {
 
 // Serializes the given |object| to JSON string.
 std::string GetJson(id object) {
   NSData* json_as_data =
       [NSJSONSerialization dataWithJSONObject:object options:0 error:nil];
-  base::scoped_nsobject<NSString> json_as_string([[NSString alloc]
-      initWithData:json_as_data
-          encoding:NSUTF8StringEncoding]);
+  NSString* json_as_string =
+      [[NSString alloc] initWithData:json_as_data
+                            encoding:NSUTF8StringEncoding];
   return base::SysNSStringToUTF8(json_as_string);
 }
 
 // Deserializes the given |json| to an object.
 id GetObject(const std::string& json) {
   NSData* json_as_data =
       [base::SysUTF8ToNSString(json) dataUsingEncoding:NSUTF8StringEncoding];
   return [NSJSONSerialization JSONObjectWithData:json_as_data
                                          options:0
                                            error:nil];
 }
 
 }  // namespace
 
 // A test fixture to test MojoFacade class.
 class MojoFacadeTest : public WebTest {
  protected:
   MojoFacadeTest() {
     interface_provider_ = base::MakeUnique<WebStateInterfaceProvider>();
     interface_provider_->registry()->AddInterface(base::Bind(
         &MojoFacadeTest::BindTestUIHandlerMojoRequest, base::Unretained(this)));
-    evaluator_.reset([[OCMockObject
-        mockForProtocol:@protocol(CRWJSInjectionEvaluator)] retain]);
-    facade_.reset(new MojoFacade(
-        interface_provider_.get(),
-        static_cast<id<CRWJSInjectionEvaluator>>(evaluator_.get())));
+    evaluator_ =
+        [OCMockObject mockForProtocol:@protocol(CRWJSInjectionEvaluator)];
+    facade_.reset(
+        new MojoFacade(interface_provider_.get(),

[Eugene But (OOO till 7-30), 2017/06/14 01:03:08]

Optional nit unrelated to ARC: s/new/MakeUnique

[marq (ping after 24h), 2017/06/14 11:59:16]

Done.

+                       static_cast<id<CRWJSInjectionEvaluator>>(evaluator_)));
   }
 
-  OCMockObject* evaluator() { return evaluator_.get(); }
+  OCMockObject* evaluator() { return evaluator_; }
   MojoFacade* facade() { return facade_.get(); }
 
  private:
   void BindTestUIHandlerMojoRequest(
       const service_manager::BindSourceInfo& source_info,
       TestUIHandlerMojoRequest request) {}
 
   std::unique_ptr<WebStateInterfaceProvider> interface_provider_;
-  base::scoped_nsobject<OCMockObject> evaluator_;
+  OCMockObject* evaluator_;
   std::unique_ptr<MojoFacade> facade_;
 };
 
 // Tests connecting to existing interface and closing the handle.
 TEST_F(MojoFacadeTest, GetInterfaceAndCloseHandle) {
   // Bind to the interface.
   NSDictionary* connect = @{
     @"name" : @"interface_provider.getInterface",
     @"args" : @{
       @"interfaceName" : @"::TestUIHandlerMojo",
@@ skipping 192 matching lines @@
   NSDictionary* message = GetObject(facade()->HandleMojoMessage(GetJson(read)));
   EXPECT_TRUE([message isKindOfClass:[NSDictionary class]]);
   EXPECT_TRUE(message);
   NSArray* expected_message = @[ @9, @2, @216 ];  // 2008 does not fit 8-bit.
   EXPECT_NSEQ(expected_message, message[@"buffer"]);
   EXPECT_FALSE([message[@"handles"] count]);
   EXPECT_EQ(MOJO_RESULT_OK, [message[@"result"] unsignedIntValue]);
 }
 
 }  // namespace web