Revert of PlzNavigate: Enforce 'frame-src' CSP on the browser.

content/renderer/content_security_policy_util.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_CONTENT_SECURITY_POLICY_UTIL_H_
 #define CONTENT_RENDERER_CONTENT_SECURITY_POLICY_UTIL_H_
 
 #include "content/common/content_security_policy/content_security_policy.h"
-#include "content/common/content_security_policy/csp_context.h"
-#include "third_party/WebKit/public/platform/WebContentSecurityPolicyStruct.h"
+
+namespace blink {
+struct WebContentSecurityPolicyPolicy;
+}  // namespace blink
 
 namespace content {
 
-// Convert a WebContentSecurityPolicy into a ContentSecurityPolicy. These two
-// classes represent the exact same thing, but one is in content, the other is
-// in blink.
+// Convert a WebContentSecurityPolicy into a ContentSecurityPolicy, these two
+// classes are the reflection of each other. One in content, the other in blink.
 ContentSecurityPolicy BuildContentSecurityPolicy(
     const blink::WebContentSecurityPolicyPolicy&);
 
-// Convert a CSPViolationParams into a WebContentSecurityPolicyViolation. These
-// two classes represent the exact same thing, but one is in content, the other
-// is in blink.
-blink::WebContentSecurityPolicyViolation BuildWebContentSecurityPolicyViolation(
-    const content::CSPViolationParams& violation_params);
-
 }  // namespace content
 
 #endif /* CONTENT_RENDERER_CONTENT_SECURITY_POLICY_UTIL_H_ */