Create a NavigationEntry for the initial blank page.

content/browser/frame_host/navigation_controller_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_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_IMPL_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
@@ skipping 61 matching lines @@
   const SessionStorageNamespaceMap& GetSessionStorageNamespaceMap()
       const override;
   SessionStorageNamespace* GetDefaultSessionStorageNamespace() override;
   void SetMaxRestoredPageID(int32 max_id) override;
   int32 GetMaxRestoredPageID() const override;
   bool NeedsReload() const override;
   void SetNeedsReload() override;
   void CancelPendingReload() override;
   void ContinuePendingReload() override;
   bool IsInitialNavigation() const override;
+  bool IsInitialBlankNavigation() const override;
   void Reload(bool check_for_repost) override;
   void ReloadIgnoringCache(bool check_for_repost) override;
   void ReloadOriginalRequestURL(bool check_for_repost) override;
   void NotifyEntryChanged(const NavigationEntry* entry) override;
   void CopyStateFrom(const NavigationController& source) override;
   void CopyStateFromAndPrune(NavigationController* source,
                              bool replace_entry) override;
   bool CanPruneAllButLastCommitted() override;
   void PruneAllButLastCommitted() override;
   void ClearAllScreenshots() override;
 
+  // This initializes the NavigationController with a NavigationEntry for the
+  // initial about:blank page, in the given SiteInstance.
+  void Init(SiteInstance* instance);
+
   // Whether this is the initial navigation in an unmodified new tab.  In this
   // case, we know there is no content displayed in the page.
   bool IsUnmodifiedBlankTab() const;
 
   // The session storage namespace that all child RenderViews belonging to
   // |instance| should use.
   SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance);
 
   // Returns the index of the specified entry, or -1 if entry is not contained
@@ skipping 335 matching lines @@
   TimeSmoother time_smoother_;
 
   scoped_ptr<NavigationEntryScreenshotManager> screenshot_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_CONTROLLER_IMPL_H_