Removing unused SetBrowserContext

content/browser/frame_host/navigation_controller_impl.h

Index: content/browser/frame_host/navigation_controller_impl.h
diff --git a/content/browser/frame_host/navigation_controller_impl.h b/content/browser/frame_host/navigation_controller_impl.h
index f43106233e1c12cf3f2718e057be678849446122..074ddd9301ebefca57b4dd9229c7ae0e7890db8f 100644
--- a/content/browser/frame_host/navigation_controller_impl.h
+++ b/content/browser/frame_host/navigation_controller_impl.h
@@ -35,21 +35,20 @@ class CONTENT_EXPORT NavigationControllerImpl
     : public NON_EXPORTED_BASE(NavigationController) {
  public:
   NavigationControllerImpl(
       NavigationControllerDelegate* delegate,
       BrowserContext* browser_context);
   ~NavigationControllerImpl() override;
 
   // NavigationController implementation:
   WebContents* GetWebContents() const override;
   BrowserContext* GetBrowserContext() const override;
-  void SetBrowserContext(BrowserContext* browser_context) override;
   void Restore(int selected_navigation,
                RestoreType type,
                std::vector<std::unique_ptr<NavigationEntry>>* entries) override;
   NavigationEntryImpl* GetActiveEntry() const override;
   NavigationEntryImpl* GetVisibleEntry() const override;
   int GetCurrentEntryIndex() const override;
   NavigationEntryImpl* GetLastCommittedEntry() const override;
   int GetLastCommittedEntryIndex() const override;
   bool CanViewSource() const override;
   int GetEntryCount() const override;