Revise comments for the PageState property on NavigationEntry.

content/public/browser/navigation_entry.h

Index: content/public/browser/navigation_entry.h
diff --git a/content/public/browser/navigation_entry.h b/content/public/browser/navigation_entry.h
index 9df14b1b10dbf77c588fd15f7ede90144cbec382..1c7d34348385efb043a8d9c6f72677602f8f1c32 100644
--- a/content/public/browser/navigation_entry.h
+++ b/content/public/browser/navigation_entry.h
@@ -76,15 +76,14 @@ class NavigationEntry {
   virtual void SetTitle(const string16& title) = 0;
   virtual const string16& GetTitle() const = 0;
 
-  // XXX
-  // Content state is an opaque blob created by WebKit that represents the
-  // state of the page. This includes form entries and scroll position for each
-  // frame. We store it so that we can supply it back to WebKit to restore form
-  // state properly when the user goes back and forward.
+  // Page state is an opaque blob created by Blink that represents the state of
+  // the page. This includes form entries and scroll position for each frame.
+  // We store it so that we can supply it back to Blink to restore form state
+  // properly when the user goes back and forward.
   //
-  // WARNING: This state is saved to the file and used to restore previous
-  // states. If the format is modified in the future, we should still be able to
-  // deal with older versions.
+  // NOTE: This state is saved to disk and used to restore previous states.  If
+  // the format is modified in the future, we should still be able to deal with
+  // older versions.
   virtual void SetPageState(const PageState& state) = 0;
   virtual const PageState& GetPageState() const = 0;