Clean up RenderViewHostManager swapping logic.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index fcf53c78ccdaf3f846cb5b122653c85730c9bbae..9e18270d0fa6a3221a5aec0eee99063fd4100dd8 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -145,10 +145,13 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual void SiteInstanceDeleting(SiteInstance* site_instance) {}
 
   // Returns true if for the navigation from |current_url| to |new_url|,
-  // processes should be swapped (even if we are in a process model that
-  // doesn't usually swap).
-  virtual bool ShouldSwapProcessesForNavigation(const GURL& current_url,
-                                                const GURL& new_url);
+  // a new SiteInstance and BrowsingInstance should be created (even if we are
+  // in a process model that doesn't usually swap).  This forces a process swap
+  // and severs script connections with existing tabs.
+  virtual bool ShouldSwapBrowsingInstanceForNavigation(
+      BrowserContext* browser_context,
+      const GURL& current_url,
+      const GURL& new_url);
 
   // Returns true if the given navigation redirect should cause a renderer
   // process swap.