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 d678a89e1afe579a12641cae0f6871628d83f880..6db0900fd98eef140c2f7b7849d61ab894f08581 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -274,6 +274,7 @@ bool RenderFrameProxy::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameMsg_DidStopLoading, OnDidStopLoading)
     IPC_MESSAGE_HANDLER(FrameMsg_DidUpdateSandboxFlags, OnDidUpdateSandboxFlags)
     IPC_MESSAGE_HANDLER(FrameMsg_DispatchLoad, OnDispatchLoad)
+    IPC_MESSAGE_HANDLER(FrameMsg_Collapse, OnCollapse)
     IPC_MESSAGE_HANDLER(FrameMsg_DidUpdateName, OnDidUpdateName)
     IPC_MESSAGE_HANDLER(FrameMsg_AddContentSecurityPolicies,
                         OnAddContentSecurityPolicies)
@@ -344,6 +345,10 @@ 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));