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 ebf13c251ca71bf82bfca0d72a099c1a0b7a8200..f991ae8aabccd29255ef9340553b9bd3762bd00e 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1500,6 +1500,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_SwapOut, OnSwapOut)
     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)
@@ -4788,6 +4789,10 @@ void RenderFrameImpl::OnStop() {
     observer.OnStop();
 }
 
+void RenderFrameImpl::OnCollapseFrameOwner(bool collapse) {
+  frame_->collapseFrameOwner(collapse);
+}
+
 void RenderFrameImpl::WasHidden() {
   for (auto& observer : observers_)
     observer.WasHidden();