PlzNavigate: implement RequestNavigation in the no live renderer case

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 39345f47e4950110ca947a5c911ab90c6ffbec41..98dd7e4b2bcc0b3db50df4baed16c0d7c265e593 100644
--- a/content/browser/frame_host/navigator.h
+++ b/content/browser/frame_host/navigator.h
@@ -11,6 +11,7 @@
 #include "ui/base/window_open_disposition.h"
 
 class GURL;
+struct FrameHostMsg_BeginNavigation_Params;
 struct FrameHostMsg_DidCommitProvisionalLoad_Params;
 struct FrameHostMsg_DidFailProvisionalLoadWithError_Params;
 
@@ -24,6 +25,7 @@ class NavigationControllerImpl;
 class NavigationEntryImpl;
 class NavigatorDelegate;
 class RenderFrameHostImpl;
+struct NavigationBeforeCommitInfo;
 
 // Implementations of this interface are responsible for performing navigations
 // in a node of the FrameTree. Its lifetime is bound to all FrameTreeNode
@@ -37,7 +39,6 @@ class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
   // Returns the NavigationController associated with this Navigator.
   virtual NavigationController* GetController();
 
-
   // Notifications coming from the RenderFrameHosts ----------------------------
 
   // The RenderFrameHostImpl started a provisional load.
@@ -119,6 +120,21 @@ class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
       bool should_replace_current_entry,
       bool user_gesture) {}
 
+  // PlzNavigate
+  // Called after receiving a FrameHostMsg_BeginNavigation IPC from the
+  // renderer. Will create a NavigationEntry for the navigation and pass it to
+  // the RenderFrameHostManager, that will dispatch a NavigationRequest to the
+  // IO thread.
+  virtual void OnBeginNavigation(
+      RenderFrameHostImpl* render_frame_host,
+      const FrameHostMsg_BeginNavigation_Params& params) {};
+
+  // PlzNavigate
+  // Signal |render_frame_host| that a navigation is ready to commit (the
+  // response to the navigation request has been received).
+  virtual void CommitNavigation(RenderFrameHostImpl* render_frame_host,
+                                const NavigationBeforeCommitInfo& info) {};
+
  protected:
   friend class base::RefCounted<Navigator>;
   virtual ~Navigator() {}