Adding chrome flag to disable implicit capture

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 1c0ac0a82eeb78cf7d33e84d536971e254773651..eca8a65c7fce8f8ccf33e24f3e5772d5457bc316 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -105,6 +105,11 @@ const base::Feature kPassiveEventListenersDueToFling{
 const base::Feature kPointerEvents{"PointerEvent",
                                    base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Whether pointer event capturing follow v1 spec instead of v2 proposal.
+// See https://rawgit.com/w3c/pointerevents/reduce-hit-tests/index.html.
+const base::Feature kPointerEventV1SpecCapturing{
+    "PointerEventV1SpecCapturing", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // RAF aligned input events support.
 const base::Feature kRafAlignedInputEvents{"RafAlignedInput",
                                            base::FEATURE_DISABLED_BY_DEFAULT};