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..0bde78417124f8212300921e9edc8550a510b770 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -84,6 +84,14 @@ 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 started capturing user key
+  // strokes.
+  void OnStartedCapturingKeyStrokes();
+
+  // Tells the preview page that the browser has stopped capturing user key
+  // strokes.
+  void OnStoppedCapturingKeyStrokes();
+
   // Tells the preview page that the active tab's search mode has changed.
   void SearchModeChanged(const chrome::search::Mode& mode);