Add onfocuschange to the Extended Search API, with associated isFocused attribute.

chrome/browser/ui/search/instant_page.h

Index: chrome/browser/ui/search/instant_page.h
diff --git a/chrome/browser/ui/search/instant_page.h b/chrome/browser/ui/search/instant_page.h
index 46f3e1a3887401e999a96a9bd30b896dbff2acfd..e702b2e532621f0a1b05c3fe037a445360c8f5a1 100644
--- a/chrome/browser/ui/search/instant_page.h
+++ b/chrome/browser/ui/search/instant_page.h
@@ -189,8 +189,8 @@ class InstantPage : public content::WebContentsObserver {
   // Tells the page whether it is allowed to display Instant results.
   void SetDisplayInstantResults(bool display_instant_results);
 
-  // Tells the page whether the browser is capturing user key strokes.
-  void KeyCaptureChanged(bool is_key_capture_enabled);
+  // Tells the page that the omnibox focus has changed.
+  void FocusChanged(OmniboxFocusState state, OmniboxFocusChangeReason reason);
 
   // Tells the page about new Most Visited data.
   void SendMostVisitedItems(