Remove NOTIFICATION_EXTENSION_ENABLED.

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 33d5dfbf24396ed174431705bc2be7371d49d8dc..393b76865f4cd4cc3fe8f865ba36cec68dc1a073 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -79,6 +79,7 @@
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/external_install_info.h"
 #include "extensions/browser/install_flag.h"
+#include "extensions/browser/lazy_background_task_queue.h"
 #include "extensions/browser/renderer_startup_helper.h"
 #include "extensions/browser/runtime_data.h"
 #include "extensions/browser/uninstall_reason.h"
@@ -144,6 +145,8 @@ const int kUpdateIdleDelay = 5;
 // TODO(samuong): Remove this in M58 (see comment in ExtensionService::Init).
 const char kDeprecatedLoadComponentExtension[] = "load-component-extension";
 
+void DoNothingWithExtensionHost(extensions::ExtensionHost* host) {}
+
 }  // namespace
 
 // ExtensionService.
@@ -929,11 +932,7 @@ void ExtensionService::EnableExtension(const std::string& extension_id) {
 
   NotifyExtensionLoaded(extension);
 
-  // Notify listeners that the extension was enabled.
-  content::NotificationService::current()->Notify(
-      extensions::NOTIFICATION_EXTENSION_ENABLED,
-      content::Source<Profile>(profile_),
-      content::Details<const Extension>(extension));
+  MaybeReconnectDevtoolsToLazyBackgroundPage(extension);
 }
 
 void ExtensionService::DisableExtension(const std::string& extension_id,
@@ -2561,3 +2560,16 @@ void ExtensionService::OnProfileDestructionStarted() {
     UnloadExtension(*it, UnloadedExtensionReason::PROFILE_SHUTDOWN);
   }
 }
+
+void ExtensionService::MaybeReconnectDevtoolsToLazyBackgroundPage(
+    const Extension* extension) {
+  OrphanedDevTools::iterator iter = orphaned_dev_tools_.find(extension->id());
+  if (iter == orphaned_dev_tools_.end())
+    return;
+  if (extensions::BackgroundInfo::HasLazyBackgroundPage(extension)) {

[Devlin, 2017/05/23 21:30:36]

Add a comment explaining this.

[lazyboy, 2017/05/23 23:19:08]

Done.

+    extensions::LazyBackgroundTaskQueue* queue =
+        extensions::LazyBackgroundTaskQueue::Get(profile_);
+    queue->AddPendingTask(profile_, extension->id(),
+                          base::Bind(&DoNothingWithExtensionHost));
+  }
+}