Rename confusing method name.

ExtensionsService::DisableUserExtensions(ids) doesn't disable the passed
extensions, but all user extensions except the passed ids.

It's very hard to notice that from the caller side, and the actual
code does completely opposite.

This CL renames this confusing method name.

BUG=680429
TEST=Refactoring only.

Review-Url: https://codereview.chromium.org/2646803003
Cr-Commit-Position: refs/heads/master@{#445603}
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 748fb3e..8d9fe637 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -948,7 +948,7 @@
   }
 }
 
-void ExtensionService::DisableUserExtensions(
+void ExtensionService::DisableUserExtensionsExcept(
     const std::vector<std::string>& except_ids) {
   extensions::ManagementPolicy* management_policy =
       system_->management_policy();