Reload Instant NTP and Instant-process tabs on search url change

chrome/browser/ui/search/instant_ntp_prerenderer.h

Index: chrome/browser/ui/search/instant_ntp_prerenderer.h
diff --git a/chrome/browser/ui/search/instant_ntp_prerenderer.h b/chrome/browser/ui/search/instant_ntp_prerenderer.h
index 933e0a854c2520c2bb1f07c56254d174c175f24b..624536893fd9850f41fca46c1ac2dc110cb99edb 100644
--- a/chrome/browser/ui/search/instant_ntp_prerenderer.h
+++ b/chrome/browser/ui/search/instant_ntp_prerenderer.h
@@ -11,14 +11,13 @@
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
+#include "chrome/browser/search/instant_service_observer.h"
 #include "chrome/browser/ui/search/instant_page.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/network_change_notifier.h"
 
-class InstantExtendedTest;
 class InstantNTP;
 class InstantService;
-class InstantTestBase;
 class Profile;
 
 // InstantNTPPrerenderer maintains a prerendered instance of InstantNTP.
@@ -31,13 +30,20 @@ class Profile;
 // InstantNTPPrerenderer is owned by InstantService.
 class InstantNTPPrerenderer
     : public InstantPage::Delegate,
-      public net::NetworkChangeNotifier::NetworkChangeObserver {
+      public net::NetworkChangeNotifier::NetworkChangeObserver,
+      public InstantServiceObserver {
  public:
   InstantNTPPrerenderer(Profile* profile, PrefService* prefs);
   virtual ~InstantNTPPrerenderer();
 
+  // Adds itself as observer on InstantService, preloads instant NTP.

[samarth, 2013/08/14 00:24:14]

nit: the first part is just an implementation detail; I would leave it out.
Likewise below.

[Anuj, 2013/08/14 06:38:57]

Done.

+  void Init();
+
+  // Removes itself as observer on InstantService, deletes NTP contents if any.
+  void Destroy();
+
   // Preloads |ntp_| with a new InstantNTP.
-  void PreloadInstantNTP();
+  void ReloadInstantNTP();
 
   // Releases and returns the InstantNTP WebContents. May be NULL. Loads a new
   // WebContents for the InstantNTP.
@@ -137,16 +143,13 @@ class InstantNTPPrerenderer
   virtual void UndoAllMostVisitedDeletions() OVERRIDE;
   virtual void InstantPageLoadFailed(content::WebContents* contents) OVERRIDE;
 
-  // Called when the default search provider changes. Resets InstantNTP.
-  void OnDefaultSearchProviderChanged(const std::string& pref_name);
+  // Overridden from InstantServiceObserver:
+  virtual void DefaultSearchProviderChanged() OVERRIDE;
+  virtual void GoogleURLUpdated() OVERRIDE;
 
   // Recreates |ntp_| using |instant_url|.
   void ResetNTP(const std::string& instant_url);
 
-  // Resets |ntp_| with a new InstantNTP. Called when |ntp_| is stale or when a
-  // pref is changed.
-  void ReloadStaleNTP();
-
   // Returns true if |ntp_| has an up-to-date Instant URL and supports Instant.
   // Note that local URLs will not pass this check.
   bool PageIsCurrent() const;