Implement the Instant extended API startMargin, endMargin, and rtl properties and the onmarginchang…

chrome/browser/instant/instant_loader.h

Index: chrome/browser/instant/instant_loader.h
diff --git a/chrome/browser/instant/instant_loader.h b/chrome/browser/instant/instant_loader.h
index 10a4e79880c92a3bc4e1062ed89ca7ff0e8760cd..9a6e426735c65a9944661b2e69bc0c94cdad8d60 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -65,10 +65,13 @@ class InstantLoader : public content::NotificationObserver {
   // is taken as the exact query (no prediction is made).
   void Update(const string16& user_text, bool verbatim);
 
-  // Tells the preview page of the bounds of the omnibox dropdown (in screen
+  // Tells the preview page of the bounds of the omnibox popup (in screen
   // coordinates). This is used by the page to offset the results to avoid them
   // being covered by the omnibox dropdown.
-  void SetOmniboxBounds(const gfx::Rect& bounds);
+  void SetPopupBounds(const gfx::Rect& bounds);
+
+  // Tells the preview page what size start and end margins to use.
+  void SetMarginSize(int start, int end);
 
   // Tells the preview page about the available autocomplete results.
   void SendAutocompleteResults(