Add URL validation to navigations initiated via RenderFrameProxyHosts.

content/browser/frame_host/render_frame_proxy_host.cc

 // Copyright 2014 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.
 
 #include "content/browser/frame_host/render_frame_proxy_host.h"
 
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "content/browser/bad_message.h"
@@ skipping 240 matching lines @@
   // Verify that we are in the same BrowsingInstance as the current
   // RenderFrameHost.
   RenderFrameHostImpl* current_rfh = frame_tree_node_->current_frame_host();
   if (!site_instance_->IsRelatedSiteInstance(current_rfh->GetSiteInstance()))
     return;
 
   // Since this navigation targeted a specific RenderFrameProxy, it should stay
   // in the current tab.
   DCHECK_EQ(CURRENT_TAB, params.disposition);
 
+  GURL validated_url(params.url);
+  GetProcess()->FilterURL(false, &validated_url);

[Charlie Reis, 2016/03/17 17:22:27]

nit: We usually try to put this as the first thing in the method, so that other
uses of params.url don't creep in above it.

[alexmos, 2016/03/17 17:30:48]

Done.

+
   // TODO(alexmos, creis): Figure out whether |params.user_gesture| needs to be
   // passed in as well.
   frame_tree_node_->navigator()->RequestTransferURL(
-      current_rfh, params.url, site_instance_.get(), std::vector<GURL>(),
+      current_rfh, validated_url, site_instance_.get(), std::vector<GURL>(),
       params.referrer, ui::PAGE_TRANSITION_LINK, GlobalRequestID(),
       params.should_replace_current_entry);
 }
 
 void RenderFrameProxyHost::OnRouteMessageEvent(
     const FrameMsg_PostMessage_Params& params) {
   RenderFrameHostImpl* target_rfh = frame_tree_node()->current_frame_host();
 
   // Only deliver the message if the request came from a RenderFrameHost in the
   // same BrowsingInstance or if this WebContents is dedicated to a browser
@@ skipping 92 matching lines @@
   target_rfh->Send(new FrameMsg_AdvanceFocus(target_rfh->GetRoutingID(), type,
                                              source_proxy_routing_id));
 }
 
 void RenderFrameProxyHost::OnFrameFocused() {
   frame_tree_node_->frame_tree()->SetFocusedFrame(frame_tree_node_,
                                                   GetSiteInstance());
 }
 
 }  // namespace content