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

chrome/browser/search/instant_service.cc

Index: chrome/browser/search/instant_service.cc
diff --git a/chrome/browser/search/instant_service.cc b/chrome/browser/search/instant_service.cc
index 62e8580219b32d5f12b5399ba1ae5057c5085115..c50d2716d87d52072854f151e122b3cca84284c1 100644
--- a/chrome/browser/search/instant_service.cc
+++ b/chrome/browser/search/instant_service.cc
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "base/logging.h"
+#include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/history/history_notifications.h"
@@ -19,18 +20,25 @@
 #include "chrome/browser/search/local_ntp_source.h"
 #include "chrome/browser/search/most_visited_iframe_source.h"
 #include "chrome/browser/search/search.h"
+#include "chrome/browser/search_engines/template_url.h"
+#include "chrome/browser/search_engines/template_url_service.h"
+#include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/webui/favicon_source.h"
 #include "chrome/browser/ui/webui/ntp/thumbnail_source.h"
 #include "chrome/browser/ui/webui/theme_source.h"
+#include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/url_data_source.h"
 #include "grit/theme_resources.h"
+#include "net/base/net_util.h"
 #include "net/url_request/url_request.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/image/image_skia.h"
@@ -57,7 +65,7 @@ RGBAColor SkColorToRGBAColor(const SkColor& sKColor) {
 
 InstantService::InstantService(Profile* profile)
     : profile_(profile),
-      ntp_prerenderer_(profile, profile->GetPrefs()),
+      ntp_prerenderer_(profile, this, profile->GetPrefs()),
       browser_instant_controller_object_count_(0),
       weak_ptr_factory_(this) {
   // Stub for unit tests.
@@ -90,15 +98,25 @@ InstantService::InstantService(Profile* profile)
                  content::Source<ThemeService>(
                      ThemeServiceFactory::GetForProfile(profile_)));
 
-  content::URLDataSource::Add(profile, new ThemeSource(profile));
+  content::URLDataSource::Add(profile_, new ThemeSource(profile_));
 #endif  // defined(ENABLE_THEMES)
 
-  content::URLDataSource::Add(profile, new ThumbnailSource(profile, false));
-  content::URLDataSource::Add(profile, new ThumbnailSource(profile, true));
-  content::URLDataSource::Add(profile, new FaviconSource(
-      profile, FaviconSource::FAVICON));
-  content::URLDataSource::Add(profile, new LocalNtpSource(profile));
-  content::URLDataSource::Add(profile, new MostVisitedIframeSource());
+
+  content::URLDataSource::Add(profile_, new ThumbnailSource(profile_, false));
+  content::URLDataSource::Add(profile_, new ThumbnailSource(profile_, true));
+  content::URLDataSource::Add(
+      profile_, new FaviconSource(profile_, FaviconSource::FAVICON));
+  content::URLDataSource::Add(profile_, new LocalNtpSource(profile_));
+  content::URLDataSource::Add(profile_, new MostVisitedIframeSource());
+
+  profile_pref_registrar_.Init(profile_->GetPrefs());
+  profile_pref_registrar_.Add(
+      prefs::kDefaultSearchProviderID,
+      base::Bind(&InstantService::OnDefaultSearchProviderChanged,
+                 base::Unretained(this)));
+
+  registrar_.Add(this, chrome::NOTIFICATION_GOOGLE_URL_UPDATED,
+                 content::Source<Profile>(profile_->GetOriginalProfile()));
   registrar_.Add(this, chrome::NOTIFICATION_PROFILE_DESTROYED,
                  content::Source<Profile>(profile_));
 }
@@ -195,7 +213,7 @@ void InstantService::OnBrowserInstantControllerCreated() {
   ++browser_instant_controller_object_count_;
 
   if (browser_instant_controller_object_count_ == 1)
-    ntp_prerenderer_.PreloadInstantNTP();
+    ntp_prerenderer_.ReloadInstantNTP();
 }
 
 void InstantService::OnBrowserInstantControllerDestroyed() {
@@ -255,6 +273,12 @@ void InstantService::Observe(int type,
         ntp_prerenderer_.DeleteNTPContents();
       break;
     }
+    case chrome::NOTIFICATION_GOOGLE_URL_UPDATED: {
+      OnGoogleURLUpdated(
+          content::Source<Profile>(source).ptr(),
+          content::Details<GoogleURLTracker::UpdatedDetails>(details).ptr());
+      break;
+    }
     default:
       NOTREACHED() << "Unexpected notification type in InstantService.";
   }
@@ -391,6 +415,44 @@ void InstantService::OnThemeChanged(ThemeService* theme_service) {
                     ThemeInfoChanged(*theme_info_));
 }
 
+void InstantService::OnGoogleURLUpdated(
+    Profile* profile,
+    GoogleURLTracker::UpdatedDetails* details) {
+  GURL last_prompted_url(
+      profile->GetPrefs()->GetString(prefs::kLastPromptedGoogleURL));
+
+  // See GoogleURLTracker::OnURLFetchComplete().
+  // last_prompted_url.is_empty() indicates very first run of Chrome. So there
+  // is no need to notify, as there won't be any old state.
+  if (last_prompted_url.is_empty())
+    return;
+
+  // Only the scheme changed. Ignore it since we do not prompt the user in this
+  // case.
+  if (net::StripWWWFromHost(details->first) ==
+      net::StripWWWFromHost(details->second))
+    return;
+
+  FOR_EACH_OBSERVER(InstantServiceObserver, observers_, GoogleURLUpdated());
+}
+
+void InstantService::OnDefaultSearchProviderChanged(
+    const std::string& pref_name) {
+  DCHECK_EQ(pref_name, std::string(prefs::kDefaultSearchProviderID));
+  const TemplateURL* template_url = TemplateURLServiceFactory::GetForProfile(
+      profile_)->GetDefaultSearchProvider();
+  if (!template_url) {
+    // A NULL |template_url| could mean either this notification is sent during
+    // the browser start up operation or the user now has no default search
+    // provider. There is no way for the user to reach this state using the
+    // Chrome settings. Only explicitly poking at the DB or bugs in the Sync
+    // could cause that, neither of which we support.
+    return;
+  }
+  FOR_EACH_OBSERVER(
+      InstantServiceObserver, observers_, DefaultSearchProviderChanged());
+}
+
 InstantNTPPrerenderer* InstantService::ntp_prerenderer() {
   return &ntp_prerenderer_;
 }