Reland "msvs/ninja win: Fix support for ImageHasSafeExceptionHandlers"

test/win/gyptest-link-safeseh.py

Index: test/win/gyptest-link-safeseh.py
diff --git a/test/win/gyptest-link-safeseh.py b/test/win/gyptest-link-safeseh.py
index 0d840096327b95f8f1f1c72e28f7a558dcc88240..31a25673f49f3d9b68a7dda134a614d48347987e 100644
--- a/test/win/gyptest-link-safeseh.py
+++ b/test/win/gyptest-link-safeseh.py
@@ -13,7 +13,7 @@ import TestGyp
 import sys
 
 if sys.platform == 'win32':
-  test = TestGyp.TestGyp(formats=['ninja'])
+  test = TestGyp.TestGyp()
 
   CHDIR = 'linker-flags'
   test.run_gyp('safeseh.gyp', chdir=CHDIR)
@@ -30,11 +30,17 @@ if sys.platform == 'win32':
   #   the safe exception handling feature. If any modules were not
   #   compatible with safe exception handling feature, the resulting image
   #   will not contain a table of safe exception handlers.
-  if HasSafeExceptionHandlers('test_safeseh_default.exe'):
+  #   However, the msvs IDE passes /SAFESEH to the linker by default, if
+  #   ImageHasSafeExceptionHandlers is not set to false in the vcxproj file.
+  #   We emulate this behavior in msvs_emulation.py, so 'test_safeseh_default'
+  #   and 'test_safeseh_yes' are built identically.
+  if not HasSafeExceptionHandlers('test_safeseh_default.exe'):
     test.fail_test()
   if HasSafeExceptionHandlers('test_safeseh_no.exe'):
     test.fail_test()
   if not HasSafeExceptionHandlers('test_safeseh_yes.exe'):
     test.fail_test()
+  if HasSafeExceptionHandlers('test_safeseh_x64.exe'):
+    test.fail_test()
 
   test.pass_test()