Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_controller.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 600 matching lines @@
     if (loader_ == loader)
       DeleteLoader();
   }
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_INSTANT_SUPPORT_DETERMINED,
       content::Source<InstantController>(this),
       content::NotificationService::NoDetails());
 }
 
+void InstantController::OnWebSearchBoxFocusChange(InstantLoader* loader,
+                                                  bool is_focused) {
+  if (loader_ == loader && extended_enabled_ &&
+      model_.mode().is_ntp() && is_focused)
+    browser_->SetInvisibleFocus();

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

I assume defocusing the fakebox by clicking elsewhere on the page, say, will
*actually* defocus the Omnibox, yes?

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

Yes, that's handled as it is normally.

+}
+
 void InstantController::SwappedTabContents(InstantLoader* loader) {
   if (loader_ == loader)
     model_.SetPreviewContents(GetPreviewContents());
 }
 
 void InstantController::InstantLoaderContentsFocused(InstantLoader* loader) {
 #if defined(USE_AURA)
   // On aura the omnibox only receives a focus lost if we initiate the focus
   // change. This does that.
   if (!model_.mode().is_default())
@@ skipping 196 matching lines @@
   }
 
   std::map<std::string, int>::const_iterator iter =
       blacklisted_urls_.find(*instant_url);
   if (iter != blacklisted_urls_.end() &&
       iter->second > kMaxInstantSupportFailures)
     return false;
 
   return true;
 }