Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/ui/omnibox/omnibox_view.h

Index: chrome/browser/ui/omnibox/omnibox_view.h
diff --git a/chrome/browser/ui/omnibox/omnibox_view.h b/chrome/browser/ui/omnibox/omnibox_view.h
index 692144f48fc5aeb8585e4c18ccab27b1dd8c29a8..8f10503b1546e4e5924236758b0e1dc2d48cb37c 100644
--- a/chrome/browser/ui/omnibox/omnibox_view.h
+++ b/chrome/browser/ui/omnibox/omnibox_view.h
@@ -152,6 +152,10 @@ class OmniboxView {
   // Sets the focus to the autocomplete view.
   virtual void SetFocus() = 0;
 
+  // Styles the omnibox according to the visibility of the focus stored in the
+  // OmniboxEditModel. Should only be called by the model.
+  virtual void ApplyFocusVisibility() = 0;
+
   // Called when the temporary text in the model may have changed.
   // |display_text| is the new text to show; |save_original_selection| is true
   // when there wasn't previously a temporary text and thus we need to save off