Fix leaking of RenderFrames.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index d57356c77d155da9a360e7d5be6e137d805ea695..0d13896b2097cd4cf58eebcad108786a7394f571 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1601,6 +1601,7 @@ bool RenderThreadImpl::OnControlMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderThreadImpl, msg)
     IPC_MESSAGE_HANDLER(FrameMsg_NewFrame, OnCreateNewFrame)
+    IPC_MESSAGE_HANDLER(FrameMsg_Detach, OnDetachFrame)
     IPC_MESSAGE_HANDLER(FrameMsg_NewFrameProxy, OnCreateNewFrameProxy)
     IPC_MESSAGE_HANDLER(ViewMsg_SetZoomLevelForCurrentURL,
                         OnSetZoomLevelForCurrentURL)
@@ -1644,6 +1645,10 @@ void RenderThreadImpl::OnCreateNewFrame(FrameMsg_NewFrame_Params params) {
       params.replication_state, compositor_deps, params.widget_params);
 }
 
+void RenderThreadImpl::OnDetachFrame(int routing_id) {
+  RenderFrameImpl::DetachFrame(routing_id);
+}
+
 void RenderThreadImpl::OnCreateNewFrameProxy(
     int routing_id,
     int render_view_routing_id,