Implement NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE.

content/renderer/render_frame_proxy.cc

Index: content/renderer/render_frame_proxy.cc
diff --git a/content/renderer/render_frame_proxy.cc b/content/renderer/render_frame_proxy.cc
index 71b4a0ac0453e6a9ea36d4e864c3e0d5381ddae3..9981b6285aabe620b7ba0dc3e6ce32a806564740 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -279,6 +279,7 @@ bool RenderFrameProxy::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_DidStopLoading, OnDidStopLoading)
     IPC_MESSAGE_HANDLER(FrameMsg_DidUpdateFramePolicy, OnDidUpdateFramePolicy)
     IPC_MESSAGE_HANDLER(FrameMsg_DispatchLoad, OnDispatchLoad)
+    IPC_MESSAGE_HANDLER(FrameMsg_Collapse, OnCollapse)
     IPC_MESSAGE_HANDLER(FrameMsg_DidUpdateName, OnDidUpdateName)
     IPC_MESSAGE_HANDLER(FrameMsg_AddContentSecurityPolicies,
                         OnAddContentSecurityPolicies)
@@ -349,6 +350,10 @@ void RenderFrameProxy::OnDispatchLoad() {
   web_frame_->DispatchLoadEventOnFrameOwner();
 }
 
+void RenderFrameProxy::OnCollapse(bool collapsed) {
+  web_frame_->Collapse(collapsed);
+}
+
 void RenderFrameProxy::OnDidUpdateName(const std::string& name,
                                        const std::string& unique_name) {
   web_frame_->SetReplicatedName(blink::WebString::FromUTF8(name));