Pick frame to navigate in the browser process.

content/browser/frame_host/navigation_controller_delegate.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_NAVIGATION_CONTROLLER_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_DELEGATE_H_
 
 #include <string>
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_details.h"
 
 namespace content {
 
 struct LoadCommittedDetails;
 struct LoadNotificationDetails;
 struct NativeWebKeyboardEvent;
+class FrameTree;
 class InterstitialPage;
 class InterstitialPageImpl;
 class RenderFrameHost;
 class RenderViewHost;
 class SiteInstance;
 class WebContents;
 class WebContentsDelegate;
 
 // Interface for objects embedding a NavigationController to provide the
 // functionality NavigationController needs.
@@ skipping 11 matching lines @@
   virtual void Stop() = 0;
   virtual SiteInstance* GetPendingSiteInstance() const = 0;
   virtual int32 GetMaxPageID() = 0;
   virtual int32 GetMaxPageIDForSiteInstance(SiteInstance* site_instance) = 0;
   virtual bool IsLoading() const = 0;
   virtual bool IsBeingDestroyed() const = 0;
   virtual bool CanOverscrollContent() const = 0;
 
   // Methods from WebContentsImpl that NavigationControllerImpl needs to
   // call.
+  virtual FrameTree* GetFrameTree() = 0;
   virtual void NotifyBeforeFormRepostWarningShow() = 0;
   virtual void NotifyNavigationEntryCommitted(
       const LoadCommittedDetails& load_details) = 0;
   virtual bool NavigateToPendingEntry(
       NavigationController::ReloadType reload_type) = 0;
   virtual void SetHistoryOffsetAndLength(int history_offset,
                                          int history_length) = 0;
   virtual void CopyMaxPageIDsFrom(WebContents* web_contents) = 0;
   virtual void UpdateMaxPageID(int32 page_id) = 0;
   virtual void UpdateMaxPageIDForSiteInstance(SiteInstance* site_instance,
@@ skipping 13 matching lines @@
       InterstitialPageImpl* interstitial_page) = 0;
   virtual void DetachInterstitialPage() = 0;
   virtual void SetIsLoading(bool is_loading,
                             bool to_different_document,
                             LoadNotificationDetails* details) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_DELEGATE_H_