Disable fpo one more time, this time for non-official (canary) builds.

build/internal/release_impl.gypi

Index: build/internal/release_impl.gypi
===================================================================
--- build/internal/release_impl.gypi	(revision 121081)
+++ build/internal/release_impl.gypi	(working copy)
@@ -3,4 +3,15 @@
 # found in the LICENSE file.
 {
   'includes': ['release_defaults.gypi'],
+  'msvs_settings': {
+    'VCCLCompilerTool': {
+      '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-'],
+    },
+  },
 }