Move/replace/rename URL-based extension getters from ExtensionService to/in ExtensionSet.

chrome/browser/task_manager/task_manager_resource_providers.cc

Index: chrome/browser/task_manager/task_manager_resource_providers.cc
diff --git a/chrome/browser/task_manager/task_manager_resource_providers.cc b/chrome/browser/task_manager/task_manager_resource_providers.cc
index 44fbf5292bd30c3a056a76b8bc3aeda9b7dc29c4..59f0a6e5265a5324d5efb6e362fc81e6c065d9c0 100644
--- a/chrome/browser/task_manager/task_manager_resource_providers.cc
+++ b/chrome/browser/task_manager/task_manager_resource_providers.cc
@@ -329,8 +329,8 @@ const Extension* TaskManagerTabContentsResource::GetExtension() const {
   if (HostsExtension()) {
     ExtensionService* extension_service =
         tab_contents_->profile()->GetExtensionService();
-    return extension_service->GetExtensionByURL(
-        tab_contents_->tab_contents()->GetURL());
+    return extension_service->extensions()->GetByID(
+        tab_contents_->tab_contents()->GetURL().host());
   }
 
   return NULL;