Abstract WebContentsObserver from Autofill shared code

chrome/browser/password_manager/password_manager_delegate_impl.cc

Index: chrome/browser/password_manager/password_manager_delegate_impl.cc
diff --git a/chrome/browser/password_manager/password_manager_delegate_impl.cc b/chrome/browser/password_manager/password_manager_delegate_impl.cc
index 989d918d9703da780de7d4a5fcf92494e4997d06..c82afc202f223c729ce2ed187564ef84c26ef48a 100644
--- a/chrome/browser/password_manager/password_manager_delegate_impl.cc
+++ b/chrome/browser/password_manager/password_manager_delegate_impl.cc
@@ -15,6 +15,7 @@
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "components/autofill/browser/autofill_manager.h"
 #include "components/autofill/common/autofill_messages.h"
+#include "components/autofill/content/browser/autofill_driver_impl.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
@@ -166,10 +167,10 @@ PasswordManagerDelegateImpl::~PasswordManagerDelegateImpl() {
 
 void PasswordManagerDelegateImpl::FillPasswordForm(
     const autofill::PasswordFormFillData& form_data) {
-  autofill::AutofillManager* autofill_manager =
-      autofill::AutofillManager::FromWebContents(web_contents_);
+  autofill::AutofillDriverImpl* autofill_driver =
+      autofill::AutofillDriverImpl::FromWebContents(web_contents_);
   // Browser process will own popup UI, so renderer should not show the popup.
-  bool disable_popup = autofill_manager->IsNativeUiEnabled();
+  bool disable_popup = autofill_driver->autofill_manager()->IsNativeUiEnabled();
 
   web_contents_->GetRenderViewHost()->Send(
       new AutofillMsg_FillPasswordForm(