Move PlzNavigate frame-src CSP check to NavigationRequest

content/browser/frame_host/ancestor_throttle.h

Index: content/browser/frame_host/ancestor_throttle.h
diff --git a/content/browser/frame_host/ancestor_throttle.h b/content/browser/frame_host/ancestor_throttle.h
index 7089a70b065d1a18c51dd92f201b780b5d12c45c..bef0114b8aab0a9518a1e0ae0eb7dca2b90b5b0a 100644
--- a/content/browser/frame_host/ancestor_throttle.h
+++ b/content/browser/frame_host/ancestor_throttle.h
@@ -38,8 +38,6 @@ class CONTENT_EXPORT AncestorThrottle : public NavigationThrottle {
 
   ~AncestorThrottle() override;
 
-  NavigationThrottle::ThrottleCheckResult WillStartRequest() override;
-  NavigationThrottle::ThrottleCheckResult WillRedirectRequest() override;
   NavigationThrottle::ThrottleCheckResult WillProcessResponse() override;
   const char* GetNameForLogging() override;
 
@@ -59,9 +57,6 @@ class CONTENT_EXPORT AncestorThrottle : public NavigationThrottle {
   HeaderDisposition ParseHeader(const net::HttpResponseHeaders* headers,
                                 std::string* header_value);
 
-  NavigationThrottle::ThrottleCheckResult CheckContentSecurityPolicyFrameSrc(
-      bool is_redirect);
-
   DISALLOW_COPY_AND_ASSIGN(AncestorThrottle);
 };