Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/ui/browser_instant_controller.cc

Index: chrome/browser/ui/browser_instant_controller.cc
diff --git a/chrome/browser/ui/browser_instant_controller.cc b/chrome/browser/ui/browser_instant_controller.cc
index f8fd4f5cc36a119230041402b6cfec1fa90d45d4..cecaf558fda9c6144a7a16dadd055ddc526858ca 100644
--- a/chrome/browser/ui/browser_instant_controller.cc
+++ b/chrome/browser/ui/browser_instant_controller.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
+#include "chrome/browser/ui/omnibox/omnibox_view.h"
 #include "chrome/browser/ui/search/search.h"
 #include "chrome/browser/ui/search/search_model.h"
 #include "chrome/browser/ui/search/search_tab_helper.h"
@@ -111,6 +112,11 @@ void BrowserInstantController::InstantPreviewFocused() {
       instant_.GetPreviewContents()->web_contents());
 }
 
+void BrowserInstantController::SetInvisibleFocus() {
+  if (browser_->window()->GetLocationBar())
+    browser_->window()->GetLocationBar()->GetLocationEntry()->SetInvisibleFocus();
+}
+
 TabContents* BrowserInstantController::GetActiveTabContents() const {
   return browser_->tab_strip_model()->GetActiveTabContents();
 }