There are two places that log failure to start, tweak the message to tell

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 650 matching lines @@
   NSError* error;
   BOOL started = [session requestStartWithConfig:config
                                          timeout:kSessionStartTimeoutSeconds
                                            error:&error];
 
   // Spin the runtime indefinitely. When the delegate gets the message that the
   // app has quit it will exit this program.
   if (started) {
     [[NSRunLoop mainRunLoop] run];
   } else {
-    LogError(@"Simulator failed to start:  \"%@\" (%@:%ld)",
+    LogError(@"Simulator failed request to start:  \"%@\" (%@:%ld)",

[rohitrao (ping after 24h), 2012/08/06 16:21:55]

I don't understand what this new error message means or how it's different from
the old one.  This is enough to dedup, but can the message itself be more
descriptive?

If this makes sense to both you and Lane, feel free to ignore.

[TVL, 2012/08/06 16:23:27]

The other case also just had "Simulator failed to start:", so this way the
strings are just enough different you can tell in logs.

              [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 EXIT_FAILURE;
 }