Replicate Content-Security-Policy into remote frame proxies.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 6dbdbb107ceadf21126e1f73a0104621d9a4861a..630a5b19831782af3bd91fcf3aa777fa6a7479bf 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -619,6 +619,10 @@ class CONTENT_EXPORT RenderFrameImpl
       const blink::WebSecurityOrigin& security_origin,
       blink::WebSetSinkIdCallbacks* web_callbacks) override;
   blink::ServiceRegistry* serviceRegistry() override;
+  void didAddContentSecurityPolicy(
+      const blink::WebString& header_value,
+      blink::WebContentSecurityPolicyType type,
+      blink::WebContentSecurityPolicySource source) override;
 
 #if defined(ENABLE_WEBVR)
   blink::WebVRClient* webVRClient() override;