Update from https://crrev.com/315085

base/test/test_support_ios.mm

Index: base/test/test_support_ios.mm
diff --git a/base/test/test_support_ios.mm b/base/test/test_support_ios.mm
index 67fae06f1dfb96d757ae03e86daab2f429711644..3b31da610b4ed08acc452c96e4377c3052ca0164 100644
--- a/base/test/test_support_ios.mm
+++ b/base/test/test_support_ios.mm
@@ -11,6 +11,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_pump_default.h"
 #include "base/test/test_suite.h"
+#include "testing/coverage_util_ios.h"
 
 // Springboard will kill any iOS app that fails to check in after launch within
 // a given time. Starting a UIApplication before invoking TestSuite::Run
@@ -165,6 +166,8 @@ static char** g_argv;
   UIApplication* application = [UIApplication sharedApplication];
   [application _terminateWithStatus:exitStatus];
 
+  coverage_util::FlushCoverageDataIfNecessary();
+
   exit(exitStatus);
 }