Update from https://crrev.com/304121

testing/iossim/iossim.mm

 // 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.
 
 #import <Foundation/Foundation.h>
 #include <asl.h>
 #include <libgen.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ skipping 486 matching lines @@
     NSFileManager* fileManager = [NSFileManager defaultManager];
     if ([fileManager fileExistsAtPath:path]) {
       NSString* content =
           [NSString stringWithContentsOfFile:path
                                     encoding:NSUTF8StringEncoding
                                        error:NULL];
       NSArray* lines = [content componentsSeparatedByCharactersInSet:
           [NSCharacterSet newlineCharacterSet]];
       NSString* simulatedAppPID =
           [NSString stringWithFormat:@"%d", session.simulatedApplicationPID];
+      NSArray* kErrorStrings = @[
+        @"Service exited with abnormal code:",
+        @"Service exited due to signal:",
+      ];
       for (NSString* line in lines) {
-        NSString* const kErrorString = @"Service exited with abnormal code:";
-        if ([line rangeOfString:kErrorString].location != NSNotFound &&
-            [line rangeOfString:simulatedAppPID].location != NSNotFound) {
-          LogWarning(@"Console message: %@", line);
-          badEntryFound = YES;
-          break;
+        if ([line rangeOfString:simulatedAppPID].location != NSNotFound) {
+          for (NSString* errorString in kErrorStrings) {
+            if ([line rangeOfString:errorString].location != NSNotFound) {
+              LogWarning(@"Console message: %@", line);
+              badEntryFound = YES;
+              break;
+            }
+          }
+          if (badEntryFound) {
+            break;
+          }
         }
       }
       // Remove the log file so subsequent invocations of iossim won't be
       // looking at stale logs.
       remove([path fileSystemRepresentation]);
     } else {
         LogWarning(@"Unable to find system log at '%@'.", path);
     }
   }
 
@@ skipping 488 matching lines @@
              [error localizedDescription],
              [error domain], static_cast<long int>([error code]));
   }
 
   // Note that this code is only executed if the simulator fails to start
   // because once the main run loop is started, only the delegate calling
   // exit() will end the program.
   [pool drain];
   return kExitFailure;
 }