Remove RenderView::GetPageId.

content/public/renderer/render_view.h

Index: content/public/renderer/render_view.h
diff --git a/content/public/renderer/render_view.h b/content/public/renderer/render_view.h
index c4fce50b7bd07f61cfc506c3c611803f70dcd378..4e6947467a746f7f04021d9c852eefe74e61b266 100644
--- a/content/public/renderer/render_view.h
+++ b/content/public/renderer/render_view.h
@@ -56,14 +56,6 @@ class CONTENT_EXPORT RenderView : public IPC::Sender {
   // Get the routing ID of the view.
   virtual int GetRoutingID() const = 0;
 
-  // Page IDs allow the browser to identify pages in each renderer process for
-  // keeping back/forward history in sync.
-  // Note that this is NOT updated for every main frame navigation, only for
-  // "regular" navigations that go into session history. In particular, client
-  // redirects, like the page cycler uses (document.location.href="foo") do not
-  // count as regular navigations and do not increment the page id.
-  virtual int GetPageId() const = 0;
-
   // Returns the size of the view.
   virtual gfx::Size GetSize() const = 0;