PROTOTYPE: PlzNavigate: use a Mojo data pipe to stream navigation data to the renderer.

content/browser/frame_host/navigator_impl.cc

Index: content/browser/frame_host/navigator_impl.cc
diff --git a/content/browser/frame_host/navigator_impl.cc b/content/browser/frame_host/navigator_impl.cc
index 79265e443d7fefbb85301a8ce7ca4ad25c37eb0d..2694a7504eb4fdecb21c82410214cc2e60d28a83 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -424,6 +424,8 @@ bool NavigatorImpl::NavigateNewChildFrame(
 void NavigatorImpl::DidNavigate(
     RenderFrameHostImpl* render_frame_host,
     const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
+  LOG(ERROR) << "NavigatorImpl::DidNavigate frame_tree_node_id: "
+             << render_frame_host->frame_tree_node()->frame_tree_node_id();
   FrameTree* frame_tree = render_frame_host->frame_tree_node()->frame_tree();
   bool oopifs_possible = SiteIsolationPolicy::AreCrossProcessFramesPossible();
 
@@ -824,9 +826,11 @@ void NavigatorImpl::OnBeginNavigation(
 }
 
 // PlzNavigate
-void NavigatorImpl::CommitNavigation(NavigationRequest* navigation_request,
-                                     ResourceResponse* response,
-                                     scoped_ptr<StreamHandle> body) {
+void NavigatorImpl::CommitNavigation(
+    NavigationRequest* navigation_request,
+    ResourceResponse* response,
+    mojo::ScopedDataPipeConsumerHandle data_consumer_handle,
+    int request_id) {
   CHECK(IsBrowserSideNavigationEnabled());
 
   DCHECK(navigation_request);
@@ -867,9 +871,10 @@ void NavigatorImpl::CommitNavigation(NavigationRequest* navigation_request,
   navigation_request->TransferNavigationHandleOwnership(render_frame_host);
   render_frame_host->navigation_handle()->ReadyToCommitNavigation(
       render_frame_host, response ? response->head.headers : nullptr);
-  render_frame_host->CommitNavigation(response, std::move(body),
-                                      navigation_request->common_params(),
-                                      navigation_request->request_params());
+  render_frame_host->CommitNavigation(
+      response, navigation_request->common_params(),
+      navigation_request->request_params(), std::move(data_consumer_handle),
+      request_id);
 }
 
 // PlzNavigate