Update from chromium https://crrev.com/302282

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 302 matching lines @@
 // window). As a workaround, iossim creates a temp file to hold output, which
 // this method reads and copies to stdout.
 - (void)tailOutputForSession:(DTiPhoneSimulatorSession*)session {
   NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 
   NSFileHandle* simio = [NSFileHandle fileHandleForReadingAtPath:stdioPath_];
   if (IsRunningWithXcode6OrLater()) {
 #if defined(IOSSIM_USE_XCODE_6)
     // With iOS 8 simulators on Xcode 6, the app output is relative to the
     // simulator's data directory.
-    if ([session.sessionConfig.simulatedSystemRoot.sdkVersion isEqual:@"8.0"]) {
+    NSString* versionString =
+        [[[session sessionConfig] simulatedSystemRoot] sdkVersion];
+    NSInteger majorVersion = [[[versionString componentsSeparatedByString:@"."]
+        objectAtIndex:0] intValue];
+    if (majorVersion >= 8) {
       NSString* dataPath = session.sessionConfig.device.dataPath;
       NSString* appOutput =
           [dataPath stringByAppendingPathComponent:stdioPath_];
       simio = [NSFileHandle fileHandleForReadingAtPath:appOutput];
     }
 #endif  // IOSSIM_USE_XCODE_6
   }
   NSFileHandle* standardOutput = [NSFileHandle fileHandleWithStandardOutput];
   // Copy data to stdout/stderr while the app is running.
   while (appRunning_) {
@@ skipping 674 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;
 }