Don't try to reload blacklisted extensions.

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 5463968d73ac7c4bfa1f3389b1db804bd027f7b5..cc5815b6e65e6e409a35fd059958ce2e90771d90 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -595,7 +595,7 @@ bool ExtensionService::UpdateExtension(const std::string& id,
   return true;
 }
 
-void ExtensionService::ReloadExtension(const std::string extension_id) {
+void ExtensionService::ReloadExtension(const std::string& extension_id) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // If the extension is already reloading, don't reload again.
@@ -604,6 +604,13 @@ void ExtensionService::ReloadExtension(const std::string extension_id) {
     return;
   }
 
+  // Ignore attempts to reload a blacklisted extension. Sometimes this can
+  // happen in a convoluted reload sequence triggered by the termination of a
+  // blacklisted extension and a naive attempt to reload it. For an example see
+  // http://crbug.com/373842.
+  if (registry_->blacklisted_extensions().Contains(extension_id))
+    return;
+
   base::FilePath path;
   const Extension* current_extension = GetExtensionById(extension_id, false);