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 941dd15b96190124a9b9567ab4e62828fa91f030..b2ab0cd38d58713f1872b96c1cd3e5ddfded7880 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -130,6 +130,10 @@ class InstantController {
                           int height,
                           InstantSizeUnits units);
 
+  // Invoked by InstantLoader to request the browser to start capturing user key
+  // strokes.
+  void StartCapturingKeyStrokes(const content::WebContents* contents);

[sreeram, 2012/12/04 21:54:58]

You don't need to pass in |contents| if only InstantLoader is expected to call
this. (cf: ShowInstantPreview).

[samarth, 2012/12/04 22:13:43]

Done.

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