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

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index f3038fcc567af331e155e05fde765758418ab92f..33e73c6d51376c9ccd63019e940a9524c60af7c4 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -29,12 +29,12 @@ class Message;
 
 namespace content {
 class GeolocationServiceContext;
-class PageState;
 class RenderFrameHost;
 class WakeLockServiceContext;
 class WebContents;
 struct AXEventNotificationDetails;
 struct ContextMenuParams;
+struct ExplodedFrameState;
 struct TransitionLayerData;
 
 // An interface implemented by an object interested in knowing about the state
@@ -94,9 +94,9 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
   // level frame.
   virtual void DocumentOnLoadCompleted(RenderFrameHost* render_frame_host) {}
 
-  // The state for the page changed and should be updated in session history.
+  // The state for the frame changed and should be updated in session history.
   virtual void UpdateStateForFrame(RenderFrameHost* render_frame_host,
-                                   const PageState& page_state) {}
+                                   const ExplodedFrameState& frame_state) {}
 
   // The page's title was changed and should be updated. Only called for the
   // top-level frame.