Kill NOTIFICATION_EXTENSION_REMOVED

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index ed7d9ce83109ea52d9080cc7296f0580934b2d3b..4ea8ff4a3eb6c3aab34b92ae5b641a032fa6a6df 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -1222,6 +1222,13 @@ void ExtensionService::NotifyExtensionUnloaded(
   UpdateActiveExtensionsInCrashReporter();
 }
 
+void ExtensionService::NotifyExtensionRemoved(const Extension* extension) {
+  for (size_t i = 0; i < extension_removed_callbacks_.size(); ++i) {
+    if (!extension_removed_callbacks_[i].is_null())
+      extension_removed_callbacks_[i].Run(extension);
+  }
+}
+
 Profile* ExtensionService::profile() {
   return profile_;
 }
@@ -1956,10 +1963,7 @@ void ExtensionService::UnloadExtension(
     NotifyExtensionUnloaded(extension.get(), reason);
   }
 
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_EXTENSION_REMOVED,
-      content::Source<Profile>(profile_),
-      content::Details<const Extension>(extension.get()));
+  NotifyExtensionRemoved(extension.get());
 }
 
 void ExtensionService::UnloadAllExtensions() {
@@ -2651,12 +2655,8 @@ void ExtensionService::UntrackTerminatedExtension(const std::string& id) {
   std::string lowercase_id = StringToLowerASCII(id);
   const Extension* extension = terminated_extensions_.GetByID(lowercase_id);
   terminated_extensions_.Remove(lowercase_id);
-  if (extension) {
-    content::NotificationService::current()->Notify(
-        chrome::NOTIFICATION_EXTENSION_REMOVED,
-        content::Source<Profile>(profile_),
-        content::Details<const Extension>(extension));
-  }
+  if (extension)
+    NotifyExtensionRemoved(extension);
 }
 
 const Extension* ExtensionService::GetTerminatedExtension(
@@ -3175,3 +3175,19 @@ void ExtensionService::RemoveUpdateObserver(
     extensions::UpdateObserver* observer) {
   update_observers_.RemoveObserver(observer);
 }
+
+void ExtensionService::RegisterExtensionRemovedCallback(
+    const base::Callback<void(const extensions::Extension*)>& callback) {
+  extension_removed_callbacks_.push_back(callback);
+}
+
+void ExtensionService::RemoveExtensionRemovedCallback(
+    const base::Callback<void(const extensions::Extension*)>& callback) {
+  for (size_t i = 0; i < extension_removed_callbacks_.size(); ++i) {
+    if (extension_removed_callbacks_[i].Equals(callback)) {
+      extension_removed_callbacks_.erase(
+          extension_removed_callbacks_.begin() + i);
+      return;
+    }
+  }
+}