Commit empty document instead of canceling the load for blocked CSP/XFO responses.

third_party/WebKit/Source/core/loader/DocumentLoader.h

Index: third_party/WebKit/Source/core/loader/DocumentLoader.h
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.h b/third_party/WebKit/Source/core/loader/DocumentLoader.h
index f13f8d9266992d74a72e3342ebac2c18f565b334..4deb73f8d54677f64471eb53d66d971d1ddd7408 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.h
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.h
@@ -141,6 +141,9 @@ public:
     };
     InitialScrollState& initialScrollState() { return m_initialScrollState; }
 
+    void setWasBlockedAfterXFrameOptionsOrCSP() { m_wasBlockedAfterXFrameOptionsOrCSP = true; }
+    bool wasBlockedAfterXFrameOptionsOrCSP() { return m_wasBlockedAfterXFrameOptionsOrCSP; }
+
     bool loadingMultipartContent() const;
 
     Resource* startPreload(Resource::Type, FetchRequest&);
@@ -221,6 +224,8 @@ private:
     ClientHintsPreferences m_clientHintsPreferences;
     InitialScrollState m_initialScrollState;
 
+    bool m_wasBlockedAfterXFrameOptionsOrCSP;
+
     enum State {
         NotStarted,
         Provisional,