Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_controller.h

Index: chrome/browser/instant/instant_controller.h
diff --git a/chrome/browser/instant/instant_controller.h b/chrome/browser/instant/instant_controller.h
index c6def6c7d0df890c55db597a0c8bc30332bc58bd..65f91ff3a97fc6c567d892e63bff0688a1177364 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -122,6 +122,10 @@ class InstantController {
   // supports the Instant API.
   void InstantSupportDetermined(InstantLoader* loader, bool supports_instant);
 
+  // Invoked by InstantLoader to notify that the Instant page searchbox received
+  // or lost focus.
+  void OnWebSearchBoxFocusChange(InstantLoader* loader, bool is_foxued);

[dhollowa, 2012/11/20 23:50:17]

nit: |is_foxued|?  I hope so! ;-)

[samarth, 2012/11/21 00:40:15]

fox·ued
n.  1. Pursed by a fox

+
   // Invoked by InstantLoader when it has swapped a different TabContents into
   // the preview, usually because a prerendered page was navigated to.
   void SwappedTabContents(InstantLoader* loader);