Replicate Content-Security-Policy into remote frame proxies.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 8b82079aa7bc60fc6c74c3f5b813b6145973f607..a11c2a0559d00029cf170ca8eccf0f27654d3f14 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -50,6 +50,7 @@
 #include "content/child/weburlresponse_extradata_impl.h"
 #include "content/common/accessibility_messages.h"
 #include "content/common/clipboard_messages.h"
+#include "content/common/content_security_policy_header.h"
 #include "content/common/frame_messages.h"
 #include "content/common/frame_replication_state.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
@@ -6014,6 +6015,20 @@ blink::ServiceRegistry* RenderFrameImpl::serviceRegistry() {
   return &blink_service_registry_;
 }
 
+void RenderFrameImpl::didAddContentSecurityPolicy(
+    const blink::WebString& header_value,
+    blink::WebContentSecurityPolicyType type,
+    blink::WebContentSecurityPolicySource source) {
+  if (!SiteIsolationPolicy::AreCrossProcessFramesPossible())

[alexmos, 2016/05/12 22:37:24]

I think this is ok.  One thought is that this might be needed when we start
enforcing CSP from the browser process even when site isolation is off, but I
guess we can revisit this then and not incur unnecessary overhead in the
meantime.

[Łukasz Anforowicz, 2016/05/13 17:29:15]

This reminds me - there are other places where we avoid sending extra IPC
messages when OOPIFs are disabled (most notably FrameHostMsg_DidChangeName). 
I'll mention bug https://crbug.com/169110 on chat.

+    return;
+
+  ContentSecurityPolicyHeader header;
+  header.header_value = base::UTF16ToUTF8(base::StringPiece16(header_value));
+  header.type = type;
+  header.source = source;
+  Send(new FrameHostMsg_DidAddContentSecurityPolicy(routing_id_, header));
+}
+
 blink::WebPlugin* RenderFrameImpl::GetWebPluginForFind() {
   if (!is_main_frame_)
     return nullptr;