Implement NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE.

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 ce8f2725ee2b813aa94e0886dfe200be4c48e5da..ddd3a127d71b121a2fc9e45b49cef2d71caf693b 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1497,6 +1497,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_SwapIn, OnSwapIn)
     IPC_MESSAGE_HANDLER(FrameMsg_Delete, OnDeleteFrame)
     IPC_MESSAGE_HANDLER(FrameMsg_Stop, OnStop)
+    IPC_MESSAGE_HANDLER(FrameMsg_CollapseFrameOwner, OnCollapseFrameOwner)
     IPC_MESSAGE_HANDLER(FrameMsg_ContextMenuClosed, OnContextMenuClosed)
     IPC_MESSAGE_HANDLER(FrameMsg_CustomContextMenuAction,
                         OnCustomContextMenuAction)
@@ -4755,6 +4756,10 @@ void RenderFrameImpl::OnStop() {
     observer.OnStop();
 }
 
+void RenderFrameImpl::OnCollapseFrameOwner(bool collapse) {
+  frame_->collapseFrameOwner(collapse);
+}
+
 void RenderFrameImpl::WasHidden() {
   for (auto& observer : observers_)
     observer.WasHidden();