PlzNavigate: implement RequestNavigation in the no live renderer case

content/browser/frame_host/render_frame_host_manager.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/referrer.h"
 
 struct FrameHostMsg_BeginNavigation_Params;
+struct FrameMsg_Navigate_Params;
 
 namespace content {
 class BrowserContext;
 class CrossProcessFrameConnector;
 class CrossSiteTransferringRequest;
 class InterstitialPageImpl;
 class FrameTreeNode;
 class NavigationControllerImpl;
 class NavigationEntry;
 class NavigationEntryImpl;
 class NavigationRequest;
 class RenderFrameHost;
 class RenderFrameHostDelegate;
 class RenderFrameHost;
 class RenderFrameHostImpl;
 class RenderFrameHostManagerTest;
 class RenderFrameProxyHost;
 class RenderViewHost;
 class RenderViewHostImpl;
 class RenderWidgetHostDelegate;
 class RenderWidgetHostView;
 class TestWebContents;
 class WebUIImpl;
+struct NavigationBeforeCommitInfo;
 
 // Manages RenderFrameHosts for a FrameTreeNode.  This class acts as a state
 // machine to make cross-process navigations in a frame possible.
 class CONTENT_EXPORT RenderFrameHostManager : public NotificationObserver {
  public:
   // Functions implemented by our owner that we need.
   //
   // TODO(brettw) Clean this up! These are all the functions in WebContentsImpl
   // that are required to run this class. The design should probably be better
   // such that these are more clear.
   //
   // There is additional complexity that some of the functions we need in
   // WebContentsImpl are inherited and non-virtual. These are named with
   // "RenderManager" so that the duplicate implementation of them will be clear.
+  //
+  // Functions and parameters whose description are prefixed by PlzNavigate are
+  // part of a navigation refactoring project, currently behind the
+  // enable-browser-side-navigation flag. The idea is to move the logic behind
+  // driving navigations from the renderer to the browser.
   class CONTENT_EXPORT Delegate {
    public:
     // Initializes the given renderer if necessary and creates the view ID
     // corresponding to this view host. If this method is not called and the
     // process is not shared, then the WebContentsImpl will act as though the
     // renderer is not running (i.e., it will render "sad tab"). This method is
     // automatically called from LoadURL. |for_main_frame_navigation| indicates
     // whether this RenderViewHost is used to render a top-level frame, so the
     // appropriate RenderWidgetHostView type is used.
     virtual bool CreateRenderViewForRenderManager(
@@ skipping 175 matching lines @@
   void SwappedOut(RenderFrameHostImpl* render_frame_host);
 
   // Called when a renderer's frame navigates.
   void DidNavigateFrame(RenderFrameHostImpl* render_frame_host);
 
   // Called when a renderer sets its opener to null.
   void DidDisownOpener(RenderViewHost* render_view_host);
 
   // Helper method to create and initialize a RenderFrameHost.  If |swapped_out|
   // is true, it will be initially placed on the swapped out hosts list.
-  // Otherwise, it will be used for a pending cross-site navigation.
   // Returns the routing id of the *view* associated with the frame.
   int CreateRenderFrame(SiteInstance* instance,
                         int opener_route_id,
                         bool swapped_out,
                         bool for_main_frame_navigation,
                         bool hidden);
 
   // Helper method to create and initialize a RenderFrameProxyHost and return
   // its routing id.
   int CreateRenderFrameProxy(SiteInstance* instance);
@@ skipping 40 matching lines @@
   void SwapOutOldPage();
 
   // Deletes a RenderFrameHost that was pending shutdown.
   void ClearPendingShutdownRFHForSiteInstance(int32 site_instance_id,
                                               RenderFrameHostImpl* rfh);
 
   // Deletes any proxy hosts associated with this node. Used during destruction
   // of WebContentsImpl.
   void ResetProxyHosts();
 
-  // Used to start a navigation, part of browser-side navigation project.
-  void OnBeginNavigation(const FrameHostMsg_BeginNavigation_Params& params);
-
   // Returns the routing id for a RenderFrameHost or RenderFrameHostProxy
   // that has the given SiteInstance and is associated with this
   // RenderFrameHostManager. Returns MSG_ROUTING_NONE if none is found.
   int GetRoutingIdForSiteInstance(SiteInstance* site_instance);
 
+  // PlzNavigate: sends a RequestNavigation IPC to the renderer to ask it to
+  // navigate. If no live renderer is present, then the navigation request will
+  // be sent directly to the ResourceDispatcherHost.
+  bool RequestNavigation(const NavigationEntryImpl& entry,
+                         const FrameMsg_Navigate_Params& navigate_params);
+
+  // PlzNavigate: Used to start a navigation. OnBeginNavigation is called
+  // directly by RequestNavigation when there is no live renderer. Otherwise, it
+  // is called following a BeginNavigation IPC from the renderer (which in
+  // browser-initiated navigation also happens after RequestNavigation has been
+  // called).
+  void OnBeginNavigation(const FrameHostMsg_BeginNavigation_Params& params);
+
+  // PlzNavigate: Called when a navigation request has received a response, to
+  // select a renderer to use for the navigation.
+  void CommitNavigation(const NavigationBeforeCommitInfo& info);
+
  private:
   friend class RenderFrameHostManagerTest;
   friend class TestWebContents;
 
   FRIEND_TEST_ALL_PREFIXES(CrossProcessFrameTreeBrowserTest,
                            CreateCrossProcessSubframeProxies);
 
   // Tracks information about a navigation while a cross-process transition is
   // in progress, in case we need to transfer it to a new RenderFrameHost.
   // When a request is being transferred, deleting the PendingNavigationParams,
@@ skipping 73 matching lines @@
       SiteInstance* new_site_instance,
       const GURL& new_effective_url,
       bool new_is_view_source_mode) const;
 
   // Returns true if it is safe to reuse the current WebUI when navigating from
   // |current_entry| to |new_entry|.
   bool ShouldReuseWebUI(
       const NavigationEntry* current_entry,
       const NavigationEntryImpl* new_entry) const;
 
+  // Returns the SiteInstance to use for the navigation.
+  SiteInstance* GetSiteInstanceForNavigation(
+      const GURL& dest_url,
+      SiteInstance* dest_instance,
+      PageTransition dest_transition,
+      bool dest_is_restore,
+      bool dest_is_view_source_mode);
+
   // Returns an appropriate SiteInstance object for the given |dest_url|,
   // possibly reusing the current SiteInstance.  If --process-per-tab is used,
   // this is only called when ShouldSwapBrowsingInstancesForNavigation returns
   // true. |dest_instance| will be used if it is not null.
+  // This is a helper function for GetSiteInstanceForNavigation.
   SiteInstance* GetSiteInstanceForURL(
       const GURL& dest_url,
       SiteInstance* dest_instance,
       PageTransition dest_transition,
       bool dest_is_restore,
       bool dest_is_view_source_mode,
       SiteInstance* current_instance,
       bool force_browsing_instance_swap);
 
+  // Creates a new RenderFrameHostImpl for the |new_instance| while respecting
+  // the opener route if needed and stores it in pending_render_frame_host_.
+  void CreateRenderFrameHostForNewSiteInstance(
+      SiteInstance* old_instance,
+      SiteInstance* new_instance,
+      bool is_main_frame);
+
   // Creates a RenderFrameHost and corresponding RenderViewHost if necessary.
   scoped_ptr<RenderFrameHostImpl> CreateRenderFrameHost(SiteInstance* instance,
                                                         int view_routing_id,
                                                         int frame_routing_id,
                                                         bool swapped_out,
                                                         bool hidden);
 
   // Sets up the necessary state for a new RenderViewHost with the given opener,
   // if necessary.  It creates a RenderFrameProxy in the target renderer process
   // with the given |proxy_routing_id|, which is used to route IPC messages when
@@ skipping 98 matching lines @@
   typedef base::hash_map<int32, linked_ptr<RenderFrameHostImpl> >
       RFHPendingDeleteMap;
   RFHPendingDeleteMap pending_delete_hosts_;
 
   // The intersitial page currently shown if any, not own by this class
   // (the InterstitialPage is self-owned, it deletes itself when hidden).
   InterstitialPageImpl* interstitial_page_;
 
   NotificationRegistrar registrar_;
 
-  // Owns a navigation request that originated in that frame until it commits.
+  // PlzNavigate: 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);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_