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 865438513dd39f0ea0d461506492a3c0736b8112..df01e288d3f2d3f9f3ce1b0f8fcef43bf88fae6a 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.
@@ -924,11 +927,7 @@ 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,
@@ -2557,3 +2556,18 @@ void ExtensionService::OnInstalledExtensionsLoaded() {
 
   OnBlacklistUpdated();
 }
+
+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)) {
+    // Wake up the event page by posting a dummy task so that we can reconnect
+    // devtools to it later in DidCreateRenderViewForBackgroundPage().
+    extensions::LazyBackgroundTaskQueue* queue =
+        extensions::LazyBackgroundTaskQueue::Get(profile_);
+    queue->AddPendingTask(profile_, extension->id(),
+                          base::Bind(&DoNothingWithExtensionHost));
+  }
+}