Move mixed content settings histograms into browser

content/browser/frame_host/render_frame_proxy_host.h

Index: content/browser/frame_host/render_frame_proxy_host.h
diff --git a/content/browser/frame_host/render_frame_proxy_host.h b/content/browser/frame_host/render_frame_proxy_host.h
index 390de28e6b8f7dab227fcbe932164a2d7bce04d3..9faa4059f937c6f07c717a7228a05a241bceab37 100644
--- a/content/browser/frame_host/render_frame_proxy_host.h
+++ b/content/browser/frame_host/render_frame_proxy_host.h
@@ -135,6 +135,8 @@ class RenderFrameProxyHost
   void OnDidChangeOpener(int32_t opener_routing_id);
   void OnAdvanceFocus(blink::WebFocusType type, int32_t source_routing_id);
   void OnFrameFocused();
+  void OnTriedDisplayingInsecureContent(const GURL& origin, const GURL& url);
+  void OnTriedRunningInsecureContent(const GURL& origin, const GURL& url);
 
   // This RenderFrameProxyHost's routing id.
   int routing_id_;