CSP: Add a mechanism to disable CSP 1.1 for layout tests.

Source/core/testing/InternalSettings.h

Index: Source/core/testing/InternalSettings.h
diff --git a/Source/core/testing/InternalSettings.h b/Source/core/testing/InternalSettings.h
index c8770d5bd350473f3ed45d330f89acefcd28bf5d..587d44dedd1c8d6290786e81f41333bd3b3b8abf 100644
--- a/Source/core/testing/InternalSettings.h
+++ b/Source/core/testing/InternalSettings.h
@@ -53,6 +53,7 @@ public:
         bool m_originalAuthorShadowDOMForAnyElementEnabled;
         bool m_originalExperimentalWebSocketEnabled;
         bool m_originalStyleScoped;
+        bool m_originalCSP;
         bool m_originalOverlayScrollbarsEnabled;
         EditingBehaviorType m_originalEditingBehavior;
         bool m_originalTextAutosizingEnabled;
@@ -118,6 +119,7 @@ public:
     void setLangAttributeAwareFormControlUIEnabled(bool);
     void setOverlayScrollbarsEnabled(bool);
     void setStyleScopedEnabled(bool);
+    void setExperimentalContentSecurityPolicyFeaturesEnabled(bool);
 
 private:
     explicit InternalSettings(Page*);