OOPIF: Support session restore by combining/splitting frame PageStates.

content/browser/frame_host/navigation_entry_impl.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_ENTRY_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 71 matching lines @@
   const GURL& GetURL() const override;
   void SetBaseURLForDataURL(const GURL& url) override;
   const GURL& GetBaseURLForDataURL() const override;
   void SetReferrer(const Referrer& referrer) override;
   const Referrer& GetReferrer() const override;
   void SetVirtualURL(const GURL& url) override;
   const GURL& GetVirtualURL() const override;
   void SetTitle(const base::string16& title) override;
   const base::string16& GetTitle() const override;
   void SetPageState(const PageState& state) override;
-  const PageState& GetPageState() const override;
+  PageState GetPageState() const override;
   void SetPageID(int page_id) override;
   int32 GetPageID() const override;
   const base::string16& GetTitleForDisplay(
       const std::string& languages) const override;
   bool IsViewSourceMode() const override;
   void SetTransitionType(ui::PageTransition transition_type) override;
   ui::PageTransition GetTransitionType() const override;
   const GURL& GetUserTypedURL() const override;
   void SetHasPostData(bool has_post_data) override;
   bool GetHasPostData() const override;
@@ skipping 385 matching lines @@
   // persisted, unless specific data is taken out/put back in at save/restore
   // time (see TabNavigation for an example of this).
   std::map<std::string, base::string16> extra_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationEntryImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_