Instant API: tell page whether the browser is capturing key strokes.

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..9c4f33e0a40f770afedabbb7ba9b8a12630f88fb 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -84,6 +84,10 @@ class InstantLoader : public content::NotificationObserver {
   // is a repeat count, negative for moving up, positive for moving down.
   void OnUpOrDownKeyPressed(int count);
 
+  // Tells the preview page that the browser has either started or stopped
+  // capturing user key strokes.
+  void OnKeyCaptureChange(bool is_key_capture_enabled);
+
   // Tells the preview page that the active tab's search mode has changed.
   void SearchModeChanged(const chrome::search::Mode& mode);