Have TabAndroid object implement the SearchTabHelperDelegate to provide the necessary functionality…

chrome/browser/android/tab_android.h

Index: chrome/browser/android/tab_android.h
diff --git a/chrome/browser/android/tab_android.h b/chrome/browser/android/tab_android.h
index 18039fb33545449ccffe11eb9dbc17514cbeb242..54bc889f6dcdeaefacdb5c2826d820cd0e8419a7 100644
--- a/chrome/browser/android/tab_android.h
+++ b/chrome/browser/android/tab_android.h
@@ -12,6 +12,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/sync/glue/synced_tab_delegate_android.h"
+#include "chrome/browser/ui/search/search_tab_helper_delegate.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "components/sessions/session_id.h"
@@ -42,6 +43,7 @@ class PrerenderManager;
 }
 
 class TabAndroid : public CoreTabHelperDelegate,
+                   public SearchTabHelperDelegate,
                    public content::NotificationObserver {
  public:
   enum TabLoadStatus {
@@ -111,6 +113,10 @@ class TabAndroid : public CoreTabHelperDelegate,
                                bool did_start_load,
                                bool did_finish_load) OVERRIDE;
 
+  // Overridden from SearchTabHelperDelegate:
+  virtual void OnWebContentsInstantSupportDisabled(
+      const content::WebContents* web_contents) OVERRIDE;
+
   // NotificationObserver -----------------------------------------------------
   virtual void Observe(int type,
                        const content::NotificationSource& source,