Move instant support to SearchTabHelper.

chrome/browser/ui/search/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/ui/search/instant_controller.h"
 
 #include <iterator>
 
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
@@ skipping 1235 matching lines @@
   } else if (IsContentsFrom(ntp(), contents)) {
     ntp_->SetDisplayInstantResults(instant_enabled_);
     ntp_->SetOmniboxBounds(omnibox_bounds_);
     ntp_->InitializeFonts();
   } else {
     NOTREACHED();
   }
   UpdateMostVisitedItems();
 }
 
+void InstantController::InstantSupportChanged(
+    InstantSupportState instant_support) {
+  // Handle INSTANT_SUPPORT_YES here because InstantPage is not hooked up to the
+  // active tab. Search model changed listener in InstantPage will handle other
+  // cases.
+  if (instant_support != INSTANT_SUPPORT_YES)
+    return;
+
+  ResetInstantTab();
+}
+
 void InstantController::InstantSupportDetermined(
     const content::WebContents* contents,
     bool supports_instant) {
   if (IsContentsFrom(instant_tab(), contents)) {
     if (!supports_instant)
       base::MessageLoop::current()->DeleteSoon(FROM_HERE,
                                                instant_tab_.release());
 
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_INSTANT_TAB_SUPPORT_DETERMINED,
@@ skipping 634 matching lines @@
   bool js_webkit_enabled = profile()->GetPrefs()->GetBoolean(
       prefs::kWebKitJavascriptEnabled);
   return js_content_enabled && js_webkit_enabled;
 }
 
 bool InstantController::InStartup() const {
   // TODO(shishir): This is not completely reliable. Find a better way to detect
   // startup time.
   return !browser_->GetActiveWebContents();
 }