Enable /Zc:StrictStrings on release builds

chrome/chrome_installer_util.gypi

Index: chrome/chrome_installer_util.gypi
diff --git a/chrome/chrome_installer_util.gypi b/chrome/chrome_installer_util.gypi
index f0928a44debb68598e759ce05b95204bf5167f5d..034322d3f2ebea0e89ac860f0999cbdbc5cc229a 100644
--- a/chrome/chrome_installer_util.gypi
+++ b/chrome/chrome_installer_util.gypi
@@ -7,6 +7,19 @@
     'variables': {
       'installer_util_target': 0,
     },
+    'conditions': [
+    ['OS=="win"', {
+        # As of the Windows 10 SDK WbemDisp.h still contains many function
+        # prototypes with BSTR strObjectPath = L"" which /Zc:StrictStrings
+        # rightly rejects, and WbemDisp.h is required by some chrome installer
+        # components.
+        'msvs_settings': {
+        'VCCLCompilerTool': {
+            'AdditionalOptions!': [ '/Zc:strictStrings' ]
+        },
+      },
+    }],
+    ],
     'target_conditions': [
       # This part is shared between the two versions of the target.
       ['installer_util_target==1', {