Introduce ActiveScriptController; track active extension scripts

chrome/browser/extensions/location_bar_controller_provider.cc

+// Copyright 2014 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 "chrome/browser/extensions/location_bar_controller_provider.h"
+
+#include "chrome/browser/extensions/tab_helper.h"
+#include "extensions/browser/extension_registry.h"
+
+namespace extensions {
+
+LocationBarControllerProvider::LocationBarControllerProvider(
+    content::WebContents* web_contents)
+    : content::WebContentsObserver(web_contents),
+      web_contents_(web_contents) {
+  DCHECK(web_contents);
+}
+
+LocationBarControllerProvider::~LocationBarControllerProvider() {
+}
+
+ExtensionRegistry* LocationBarControllerProvider::GetExtensionRegistry() {
+  return ExtensionRegistry::Get(web_contents_->GetBrowserContext());
+}
+
+void LocationBarControllerProvider::NotifyChange() {
+  TabHelper::FromWebContents(web_contents_)->location_bar_controller()
+      ->NotifyChange();
+}
+
+void LocationBarControllerProvider::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  NavigatedMainFrame(details, params);
+}
+
+}  // namespace extensions