Implements strict secure cookies as the default behavior in //net

net/base/layered_network_delegate.h

Index: net/base/layered_network_delegate.h
diff --git a/net/base/layered_network_delegate.h b/net/base/layered_network_delegate.h
index 496f98e2ea4eb8faceef6bd09578ef3511c571fd..1666d86a6b5072f4161ade284e226b9c2b08dd1c 100644
--- a/net/base/layered_network_delegate.h
+++ b/net/base/layered_network_delegate.h
@@ -82,7 +82,6 @@ class NET_EXPORT LayeredNetworkDelegate : public NetworkDelegate {
   bool OnCanEnablePrivacyMode(const GURL& url,
                               const GURL& first_party_for_cookies) const final;
   bool OnAreExperimentalCookieFeaturesEnabled() const final;
-  bool OnAreStrictSecureCookiesEnabled() const final;
   bool OnCancelURLRequestWithPolicyViolatingReferrerHeader(
       const URLRequest& request,
       const GURL& target_url,
@@ -152,7 +151,6 @@ class NET_EXPORT LayeredNetworkDelegate : public NetworkDelegate {
       const GURL& first_party_for_cookies) const;
 
   virtual void OnAreExperimentalCookieFeaturesEnabledInternal() const;
-  virtual void OnAreStrictSecureCookiesEnabledInternal() const;
 
   virtual void OnCancelURLRequestWithPolicyViolatingReferrerHeaderInternal(
       const URLRequest& request,