Initial PlzNavigate RDH-side logic.

content/browser/frame_host/navigator.h

Index: content/browser/frame_host/navigator.h
diff --git a/content/browser/frame_host/navigator.h b/content/browser/frame_host/navigator.h
index b05b538a2114c1a47ba7a31046d6ce8a424dd1f5..328044e4623136199c28a9151a516dc75c601d55 100644
--- a/content/browser/frame_host/navigator.h
+++ b/content/browser/frame_host/navigator.h
@@ -28,8 +28,10 @@ class NavigationEntryImpl;
 class NavigationRequest;
 class NavigatorDelegate;
 class RenderFrameHostImpl;
+class StreamHandle;
 struct CommonNavigationParams;
 struct NavigationBeforeCommitInfo;
+struct ResourceResponse;
 
 // Implementations of this interface are responsible for performing navigations
 // in a node of the FrameTree. Its lifetime is bound to all FrameTreeNode
@@ -127,7 +129,8 @@ class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
   // Signal |render_frame_host| that a navigation is ready to commit (the
   // response to the navigation request has been received).
   virtual void CommitNavigation(FrameTreeNode* frame_tree_node,
-                                const NavigationBeforeCommitInfo& info) {}
+                                ResourceResponse* response,
+                                scoped_ptr<StreamHandle> body);
 
   // PlzNavigate
   // Cancel a NavigationRequest for |frame_tree_node|. Called when