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 76f486292d86f920fce0957e7d0abedd603f6a0f..525848abb2b093194af4ba22f25d34882f2de37f 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -275,6 +275,7 @@ 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_AddContentSecurityPolicy,
                         OnAddContentSecurityPolicy)
@@ -345,6 +346,10 @@ 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),