[sessions] Remove most knowledge of //chrome from core tab restore code

chrome/browser/sessions/chrome_tab_restore_service_client.cc

 // Copyright 2015 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/sessions/chrome_tab_restore_service_client.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
+#include "chrome/common/url_constants.h"
+
+#if defined(ENABLE_EXTENSIONS)
+#include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/extensions/extension_metrics.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/extension_set.h"
+#endif
+
+namespace {
+
+void RecordAppLaunch(Profile* profile, const GURL& url) {
+#if defined(ENABLE_EXTENSIONS)
+  const extensions::Extension* extension =
+      extensions::ExtensionRegistry::Get(profile)
+          ->enabled_extensions()
+          .GetAppByURL(url);
+  if (!extension)
+    return;
+
+  extensions::RecordAppLaunchType(
+      extension_misc::APP_LAUNCH_NTP_RECENTLY_CLOSED, extension->GetType());
+#endif  // defined(ENABLE_EXTENSIONS)
+}
+
+}  // namespace
 
 ChromeTabRestoreServiceClient::ChromeTabRestoreServiceClient(Profile* profile)
     : profile_(profile) {}
 
 ChromeTabRestoreServiceClient::~ChromeTabRestoreServiceClient() {}
 
+base::FilePath ChromeTabRestoreServiceClient::GetPathToSaveTo() {
+  return profile_->GetPath();
+}
+
+GURL ChromeTabRestoreServiceClient::GetNewTabURL() {
+  return GURL(chrome::kChromeUINewTabURL);
+}
+
 bool ChromeTabRestoreServiceClient::HasLastSession() {
 #if defined(ENABLE_SESSION_SERVICE)
   SessionService* session_service =
       SessionServiceFactory::GetForProfile(profile_);
   Profile::ExitType exit_type = profile_->GetLastSessionExitType();
   // The previous session crashed and wasn't restored, or was a forced
   // shutdown. Both of which won't have notified us of the browser close so
   // that we need to load the windows from session service (which will have
   // saved them).
   return (!profile_->restored_last_session() && session_service &&
           (exit_type == Profile::EXIT_CRASHED ||
            exit_type == Profile::EXIT_SESSION_ENDED));
 #else
   return false;
 #endif
 }
 
 void ChromeTabRestoreServiceClient::GetLastSession(
     const sessions::GetLastSessionCallback& callback,
     base::CancelableTaskTracker* tracker) {
   DCHECK(HasLastSession());
 #if defined(ENABLE_SESSION_SERVICE)
   SessionServiceFactory::GetForProfile(profile_)
       ->GetLastSession(callback, tracker);
 #endif
 }
+
+void ChromeTabRestoreServiceClient::OnTabRestored(const GURL& url) {
+  RecordAppLaunch(profile_, url);
+}