Add a FrameHostMsg_BeginNavigation IPC

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index b7039f5cbe7b8a6959f6c2d93bb69a65f7f27c21..a9c2893c5ca5aa46274575b394efc465580b0ca5 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -17,6 +17,7 @@
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/referrer.h"
 
+struct FrameHostMsg_BeginNavigation_Params;
 
 namespace content {
 class BrowserContext;
@@ -27,6 +28,7 @@ class FrameTreeNode;
 class NavigationControllerImpl;
 class NavigationEntry;
 class NavigationEntryImpl;
+class NavigationRequest;
 class RenderFrameHost;
 class RenderFrameHostDelegate;
 class RenderFrameHostImpl;
@@ -300,6 +302,9 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
   // of WebContentsImpl.
   void ResetProxyHosts();
 
+  // Used to start a navigation, part of PlzNavigate project.
+  void BeginNavigation(const FrameHostMsg_BeginNavigation_Params& params);
+
  private:
   friend class RenderFrameHostManagerTest;
   friend class TestWebContents;
@@ -349,6 +354,11 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
     bool should_replace_current_entry;
   };
 
+  // Returns the current navigation request (used in the PlzNavigate navigation
+  // logic refactoring project).
+  NavigationRequest* navigation_request_for_testing() const {
+    return navigation_request_.get(); }
+
   // Used with FrameTree::ForEach to erase RenderFrameProxyHosts from a
   // FrameTreeNode's RenderFrameHostManager.
   static bool ClearProxiesInSiteInstance(int32 site_instance_id,
@@ -494,6 +504,9 @@ class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
 
   NotificationRegistrar registrar_;
 
+  // Owns a navigation request that originated in that frame until it commits.
+  scoped_ptr<NavigationRequest> navigation_request_;
+
   base::WeakPtrFactory<RenderFrameHostManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManager);