Abstract WebContentsObserver from Autofill shared code

components/autofill/content/browser/autofill_driver_impl.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/autofill/content/browser/autofill_driver_impl.h"
+
+#include "components/autofill/browser/autofill_external_delegate.h"
+#include "components/autofill/browser/autofill_manager.h"
+#include "components/autofill/browser/autofill_manager_delegate.h"
+#include "content/public/browser/web_contents.h"
+
+namespace autofill {
+
+namespace {
+
+const char kAutofillDriverImplWebContentsUserDataKey[] =
+    "web_contents_autofill_driver_impl";
+
+}  // namespace
+
+// static
+void AutofillDriverImpl::CreateForWebContentsAndDelegate(
+    content::WebContents* contents,
+    autofill::AutofillManagerDelegate* delegate,
+    const std::string& app_locale,
+    AutofillManager::AutofillDownloadManagerState enable_download_manager,
+    bool enable_native_ui) {
+  if (FromWebContents(contents))
+    return;
+
+  contents->SetUserData(kAutofillDriverImplWebContentsUserDataKey,
+                        new AutofillDriverImpl(contents,
+                                               delegate,
+                                               app_locale,
+                                               enable_download_manager,
+                                               enable_native_ui));
+  // Trigger the lazy creation of AutocheckoutWhitelistManagerService, and
+  // schedule a fetch of the Autocheckout whitelist file if it's not already
+  // loaded. This helps ensure that the whitelist will be available by the time
+  // the user navigates to a form on which Autocheckout should be enabled.
+  delegate->GetAutocheckoutWhitelistManager();
+}
+
+// static
+AutofillDriverImpl* AutofillDriverImpl::FromWebContents(
+    content::WebContents* contents) {
+  return static_cast<AutofillDriverImpl*>(
+      contents->GetUserData(kAutofillDriverImplWebContentsUserDataKey));
+}
+
+AutofillDriverImpl::AutofillDriverImpl(
+    content::WebContents* web_contents,
+    autofill::AutofillManagerDelegate* delegate,
+    const std::string& app_locale,
+    AutofillManager::AutofillDownloadManagerState enable_download_manager,
+    bool enable_native_ui)
+    : content::WebContentsObserver(web_contents),
+      autofill_manager_(this, delegate, app_locale, enable_download_manager) {
+  if (enable_native_ui) {
+    // TODO(blundell): Eliminate AutofillExternalDelegate being a WCUD and
+    // transfer ownership of it to this class.
+    AutofillExternalDelegate::CreateForWebContentsAndManager(
+        web_contents, &autofill_manager_);
+    autofill_manager_.SetExternalDelegate(
+        AutofillExternalDelegate::FromWebContents(web_contents));
+  }
+}
+
+AutofillDriverImpl::~AutofillDriverImpl() {}
+
+content::WebContents* AutofillDriverImpl::GetWebContents() {
+  return web_contents();
+}
+
+bool AutofillDriverImpl::OnMessageReceived(const IPC::Message& message) {
+  // TODO(blundell): Move IPC handling into this class.
+  return autofill_manager_.OnMessageReceived(message);
+}
+
+void AutofillDriverImpl::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  // TODO(blundell): Move the logic of this method into this class.
+  autofill_manager_.DidNavigateMainFrame(details, params);
+}
+
+}  // namespace autofill