[Extensions] Update extensions UI to observe events and add test

chrome/browser/ui/webui/extensions/extension_settings_handler.cc

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
index 92cdd553cc938cea3a8fedfcf0735177164d8d64..30627a292fac131b4a87ca6651c167a8ad5fd3b2 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
@@ -20,7 +20,6 @@
 #include "chrome/browser/background/background_contents.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/extensions/error_console/error_console.h"
 #include "chrome/browser/extensions/extension_management.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
@@ -99,11 +98,8 @@ ExtensionSettingsHandler::ExtensionSettingsHandler()
       deleting_rph_id_(-1),
       registered_for_notifications_(false),
       warning_service_observer_(this),
-      error_console_observer_(this),
       extension_prefs_observer_(this),
-      extension_registry_observer_(this),
-      extension_management_observer_(this),
-      should_do_verification_check_(false) {
+      extension_management_observer_(this) {
 }
 
 ExtensionSettingsHandler::~ExtensionSettingsHandler() {
@@ -368,10 +364,6 @@ void ExtensionSettingsHandler::RegisterMessages() {
                  AsWeakPtr()));
 }
 
-void ExtensionSettingsHandler::OnErrorAdded(const ExtensionError* error) {
-  MaybeUpdateAfterNotification();
-}
-
 void ExtensionSettingsHandler::Observe(
     int type,
     const content::NotificationSource& source,
@@ -425,26 +417,6 @@ void ExtensionSettingsHandler::Observe(
   }
 }
 
-void ExtensionSettingsHandler::OnExtensionLoaded(
-    content::BrowserContext* browser_context,
-    const Extension* extension) {
-  MaybeUpdateAfterNotification();
-}
-
-void ExtensionSettingsHandler::OnExtensionUnloaded(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    UnloadedExtensionInfo::Reason reason) {
-  MaybeUpdateAfterNotification();
-}
-
-void ExtensionSettingsHandler::OnExtensionUninstalled(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    extensions::UninstallReason reason) {
-  MaybeUpdateAfterNotification();
-}
-
 void ExtensionSettingsHandler::OnExtensionDisableReasonsChanged(
     const std::string& extension_id, int disable_reasons) {
   MaybeUpdateAfterNotification();
@@ -498,10 +470,10 @@ void ExtensionSettingsHandler::HandleRequestExtensionsData(
 
   // Promote the Chrome Apps & Extensions Developer Tools if they are not
   // installed and the user has not previously dismissed the warning.
+  ExtensionRegistry* registry = ExtensionRegistry::Get(profile);
   bool promote_apps_dev_tools = false;
-  if (!ExtensionRegistry::Get(Profile::FromWebUI(web_ui()))->
-          GetExtensionById(kAppsDeveloperToolsExtensionId,
-                           ExtensionRegistry::EVERYTHING) &&
+  if (!registry->GetExtensionById(kAppsDeveloperToolsExtensionId,
+                                  ExtensionRegistry::EVERYTHING) &&
       !profile->GetPrefs()->GetBoolean(prefs::kExtensionsUIDismissedADTPromo)) {
     promote_apps_dev_tools = true;
   }
@@ -516,14 +488,26 @@ void ExtensionSettingsHandler::HandleRequestExtensionsData(
       "extensions.ExtensionSettings.returnExtensionsData", results);
 
   MaybeRegisterForNotifications();
-  UMA_HISTOGRAM_BOOLEAN("ExtensionSettings.ShouldDoVerificationCheck",
-                        should_do_verification_check_);
-  if (should_do_verification_check_) {
-    should_do_verification_check_ = false;
-    ExtensionSystem::Get(Profile::FromWebUI(web_ui()))
-        ->install_verifier()
-        ->VerifyAllExtensions();
+
+  scoped_ptr<ExtensionSet> extensions =
+      registry->GenerateInstalledExtensionsSet(ExtensionRegistry::ENABLED |
+                                               ExtensionRegistry::DISABLED |
+                                               ExtensionRegistry::TERMINATED);
+  ExtensionPrefs* prefs = ExtensionPrefs::Get(profile);
+  bool should_do_verification_check = false;
+  for (const scoped_refptr<const Extension>& extension : *extensions) {
+    if (ui_util::ShouldDisplayInExtensionSettings(extension.get(), profile) &&
+        ((prefs->GetDisableReasons(extension->id()) &
+             Extension::DISABLE_NOT_VERIFIED) != 0)) {
+      should_do_verification_check = true;
+      break;
+    }
   }
+
+  UMA_HISTOGRAM_BOOLEAN("ExtensionSettings.ShouldDoVerificationCheck",
+                        should_do_verification_check);
+  if (should_do_verification_check)
+    ExtensionSystem::Get(profile)->install_verifier()->VerifyAllExtensions();
 }
 
 void ExtensionSettingsHandler::HandleToggleDeveloperMode(
@@ -650,14 +634,10 @@ void ExtensionSettingsHandler::MaybeRegisterForNotifications() {
                  content::NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
                  content::NotificationService::AllBrowserContextsAndSources());
 
-  extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
-
   content::WebContentsObserver::Observe(web_ui()->GetWebContents());
 
   warning_service_observer_.Add(WarningService::Get(profile));
 
-  error_console_observer_.Add(ErrorConsole::Get(profile));
-
   extension_management_observer_.Add(
       ExtensionManagementFactory::GetForBrowserContext(profile));
 }