[Extensions] Don't run unload listeners when an extension is removed

chrome/browser/ui/fast_unload_controller.cc

Index: chrome/browser/ui/fast_unload_controller.cc
diff --git a/chrome/browser/ui/fast_unload_controller.cc b/chrome/browser/ui/fast_unload_controller.cc
index 503c137f4d86af2130e728574037f5485ebb5c6b..d516d89b2ba720d77c33df7c92926f735ab6b5fd 100644
--- a/chrome/browser/ui/fast_unload_controller.cc
+++ b/chrome/browser/ui/fast_unload_controller.cc
@@ -23,8 +23,12 @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 
-namespace chrome {
+#if defined (ENABLE_EXTENSIONS)
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/constants.h"
+#endif  // (ENABLE_EXTENSIONS)
 
+namespace chrome {
 
 ////////////////////////////////////////////////////////////////////////////////
 // DetachedWebContentsDelegate will delete web contents when they close.
@@ -82,6 +86,19 @@ bool FastUnloadController::ShouldRunUnloadEventsHelper(
 
 bool FastUnloadController::RunUnloadEventsHelper(
     content::WebContents* contents) {
+#if defined (ENABLE_EXTENSIONS)
+  // Don't run for extensions that are disabled or uninstalled; the tabs will
+  // be killed if they make any network requests, and the extension shouldn't
+  // be doing any work if it's removed.
+  GURL url = contents->GetLastCommittedURL();
+  if (url.SchemeIs(extensions::kExtensionScheme) &&
+      !extensions::ExtensionRegistry::Get(browser_->profile())
+           ->enabled_extensions()
+           .GetExtensionOrAppByURL(url)) {
+    return false;
+  }
+#endif  // (ENABLE_EXTENSIONS)
+
   // Special case for when we quit an application. The Devtools window can
   // close if it's beforeunload event has already fired which will happen due
   // to the interception of it's content's beforeunload.