Introduce a couple of abstract bases for WebDataService.

chrome/browser/webdata/web_data_service_factory.cc

Index: chrome/browser/webdata/web_data_service_factory.cc
diff --git a/chrome/browser/webdata/web_data_service_factory.cc b/chrome/browser/webdata/web_data_service_factory.cc
index f86f28fd12b88c0580eb5f88245ef94eaedaf5aa..1dddaf890e40d5552a97ec5bd288c43ed7827ed9 100644
--- a/chrome/browser/webdata/web_data_service_factory.cc
+++ b/chrome/browser/webdata/web_data_service_factory.cc
@@ -6,9 +6,21 @@
 
 #include "base/file_path.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
+#include "chrome/browser/webdata/autofill_web_data_service_impl.h"
 #include "chrome/browser/webdata/web_data_service.h"
 #include "chrome/common/chrome_constants.h"
 
+// static
+scoped_ptr<AutofillWebDataService> AutofillWebDataServiceImpl::ForContext(
+    content::BrowserContext* context) {
+  // TODO(joi): Does the implicit/explicit distinction really matter?

[erikwright (departed), 2012/09/11 20:49:06]

Presumably you will answer this question before committing this code?

+  // It's just used for a DCHECK.
+  scoped_refptr<WebDataService> service = WebDataServiceFactory::GetForProfile(
+      static_cast<Profile*>(context), Profile::EXPLICIT_ACCESS);
+  return scoped_ptr<AutofillWebDataService>(
+      new AutofillWebDataServiceImpl(service));
+}
+
 WebDataServiceFactory::WebDataServiceFactory()
     : RefcountedProfileKeyedServiceFactory(
           "WebDataService",