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

chrome/browser/instant/instant_client.h

Index: chrome/browser/instant/instant_client.h
diff --git a/chrome/browser/instant/instant_client.h b/chrome/browser/instant/instant_client.h
index 95ab9096d75d298fdc9736ea61838e03d824cad0..c74031232e8c1bb9a996610b5b8badd03caf6286 100644
--- a/chrome/browser/instant/instant_client.h
+++ b/chrome/browser/instant/instant_client.h
@@ -89,7 +89,10 @@ class InstantClient : public content::WebContentsObserver {
   // Tells the page the bounds of the omnibox dropdown (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 page what size start and end margins to use.
+  void SetMarginSize(const int start, const int end);
 
   // Tells the renderer to determine if the page supports the Instant API, which
   // results in a call to InstantSupportDetermined() when the reply is received.