Provide a way to suppress implicit MIDL generation rules for actions

test/win/idl-rules/basic-idl.gyp

Index: test/win/idl-rules/basic-idl.gyp
diff --git a/test/win/idl-rules/basic-idl.gyp b/test/win/idl-rules/basic-idl.gyp
index 9c08327574e3a080200c2fa322b5a4a8f8b5c6e1..63efe72f4c31c7df2d379129dda2f94c7eabc3f5 100644
--- a/test/win/idl-rules/basic-idl.gyp
+++ b/test/win/idl-rules/basic-idl.gyp
@@ -38,5 +38,29 @@
          },
       },
     },
+    {
+      'target_name': 'idl_explicit_action',
+      'type': 'none',
+      'sources': [
+        'Window.idl',
+      ],
+      'actions': [{
+        'action_name': 'blink_idl',
+        'explicit_idl_action': 1,

[scottmg, 2014/08/12 03:34:02]

you should add

'msvs_cygwin_shell': 0,

here.

+        'inputs': [
+          'Window.idl',
+          'idl_compiler.py',
+        ],
+        'outputs': [
+          '<(RULE_INPUT_ROOT).cpp',
+          '<(RULE_INPUT_ROOT).h',
+        ],
+        'action': [
+          'python',
+          'idl_compiler.py',
+          'Window.idl',
+        ],
+      }],
+    },
   ],
 }