[ObjC ARC] Converts ios/chrome/browser/crash_report to ARC

ios/chrome/browser/crash_report/breakpad_helper.mm

 // Copyright 2015 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.
 
 #include "ios/chrome/browser/crash_report/breakpad_helper.h"
 
 #import <Foundation/Foundation.h>
 #include <stddef.h>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/crash_logging.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/strings/sys_string_conversions.h"
 #include "ios/chrome/browser/chrome_paths.h"
 #import "ios/chrome/browser/crash_report/crash_report_user_application_state.h"
 #include "ios/web/public/web_thread.h"
 
 // TODO(stuartmorgan): Move this up where it belongs once
 // http://code.google.com/p/google-breakpad/issues/detail?id=487
 // is fixed. For now, put it at the end to avoid compiler errors.
 #import "breakpad/src/client/ios/BreakpadController.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace breakpad_helper {
 
 namespace {
 
 // Key in NSUserDefaults for a Boolean value that stores whether to upload
 // crash reports.
 NSString* const kCrashReportsUploadingEnabledKey =
     @"CrashReportsUploadingEnabled";
 
 NSString* const kCrashedInBackground = @"crashed_in_background";
@@ skipping 148 matching lines @@
     [[BreakpadController sharedInstance] addUploadParameter:value forKey:key];
     return;
   }
   dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
   [[BreakpadController sharedInstance] withBreakpadRef:^(BreakpadRef ref) {
     if (ref)
       BreakpadAddUploadParameter(ref, key, value);
     dispatch_semaphore_signal(semaphore);
   }];
   dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
-  dispatch_release(semaphore);
 }
 
 int GetCrashReportCount() {
   dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
   __block int outerCrashReportCount = 0;
   [[BreakpadController sharedInstance] getCrashReportCount:^(int count) {
     outerCrashReportCount = count;
     dispatch_semaphore_signal(semaphore);
   }];
   dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
-  dispatch_release(semaphore);
   return outerCrashReportCount;
 }
 
 void GetCrashReportCount(void (^callback)(int)) {
   [[BreakpadController sharedInstance] getCrashReportCount:callback];
 }
 
 bool HasReportToUpload() {
   return GetCrashReportCount() > 0;
 }
@@ skipping 141 matching lines @@
 void RestoreDefaultConfiguration() {
   if (!g_crash_reporter_enabled)
     return;
   [[BreakpadController sharedInstance] stop];
   [[BreakpadController sharedInstance] resetConfiguration];
   [[BreakpadController sharedInstance] start:NO];
   [[BreakpadController sharedInstance] setUploadingEnabled:NO];
 }
 
 }  // namespace breakpad_helper