Pass the /safeseh option to ml.exe.

test/win/linker-flags/safeseh.gyp

+# Copyright (c) 2014 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+ 'targets': [
+    {
+      'target_name': 'test_safeseh_default',
+      'type': 'executable',
+      'msvs_settings': {
+      },
+      'sources': [
+        'safeseh_hello.cc',
+        'safeseh_zero.asm',

[wtc, 2014/04/10 22:21:43]

All object files produced by Visual C++ are apparently compatible with the safe
exception handling feature, so I have to use a .asm file in this test.

+      ],
+    },
+    {
+      'target_name': 'test_safeseh_no',
+      'type': 'executable',
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'ImageHasSafeExceptionHandlers': 'false',
+        },
+      },
+      'sources': [
+        'safeseh_hello.cc',
+        'safeseh_zero.asm',
+      ],
+    },
+    {
+      'target_name': 'test_safeseh_yes',
+      'type': 'executable',
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'ImageHasSafeExceptionHandlers': 'true',
+        },
+        'MASM': {

[wtc, 2014/04/10 22:21:43]

Ideally I don't want to add the 'MASM' setting, and I want this target to fail
to build. But I don't know make the test to expect a build failure of this
target, so I am taking the easy way out. I've spent more time than I'd like on
this CL :-)

+          'UseSafeExceptionHandlers': 'true',
+        },
+      },
+      'sources': [
+        'safeseh_hello.cc',
+        'safeseh_zero.asm',
+      ],
+    },
+  ]
+}