win_release_OmitFramePointers=0 must explicitly pass /Oy-

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index bb3726c6c50d49eea1a133c94535b8638d393be8..9c9fdd5dc86fb9aecdf91bdc3e84c0dd13a96579 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1493,6 +1493,12 @@
               }],
               ['win_release_OmitFramePointers==0', {
                 'OmitFramePointers': 'false',
+                # The above is not sufficient (http://crbug.com/106711): it
+                # simply eliminates an explicit "/Oy", but both /O2 and /Ox
+                # perform FPO regardless, so we must explicitly disable.
+                # We still want the false setting above to avoid having
+                # "/Oy /Oy-" and warnings about overriding.
+                'AdditionalOptions': ['/Oy-'],
               }],
             ],
           },