Fix leaking of RenderFrames.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 18a88eb441030f40bbeb1fb55ee33ec8085b8d4f..cd50205f58165bb2bec56f12995c0a707b8134e3 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -258,11 +258,18 @@ RenderFrameHostImpl::~RenderFrameHostImpl() {
   if (delegate_ && render_frame_created_)
     delegate_->RenderFrameDeleted(this);
 
-  // If this was swapped out, it already decremented the active frame count of
-  // the SiteInstance it belongs to.
-  if (IsRFHStateActive(rfh_state_))
+  if (IsRFHStateActive(rfh_state_)) {
+    // If this was swapped out, it already decremented the active frame count of
+    // the SiteInstance it belongs to.
     GetSiteInstance()->decrement_active_frame_count();
 
+    // In the case of swapping with a RenderFrameProxy, cleanup is already
+    // handled on the renderer process side. However, in all other cases the
+    // corresponding RenderFrame also needs to be cleaned up.
+    if (render_frame_created_)
+      Send(new FrameMsg_Detach(routing_id_));
+  }
+
   // NULL out the swapout timer; in crash dumps this member will be null only if
   // the dtor has run.
   swapout_event_monitor_timeout_.reset();