Replace string16 with base::string16.

chrome/browser/background/background_mode_manager_unittest.cc

 // Copyright (c) 2011 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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/browser_shutdown.h"
@@ skipping 102 matching lines @@
   int profile_app_count_;
 
   // Flags to track whether we are launching on startup/have a status tray.
   bool have_status_tray_;
   bool launch_on_startup_;
 };
 
 class TestStatusIcon : public StatusIcon {
   virtual void SetImage(const gfx::ImageSkia& image) OVERRIDE {}
   virtual void SetPressedImage(const gfx::ImageSkia& image) OVERRIDE {}
-  virtual void SetToolTip(const string16& tool_tip) OVERRIDE {}
+  virtual void SetToolTip(const base::string16& tool_tip) OVERRIDE {}
   virtual void DisplayBalloon(const gfx::ImageSkia& icon,
-                              const string16& title,
-                              const string16& contents) OVERRIDE {}
+                              const base::string16& title,
+                              const base::string16& contents) OVERRIDE {}
   virtual void UpdatePlatformContextMenu(
       StatusIconMenuModel* menu) OVERRIDE {}
 };
 
 static void AssertBackgroundModeActive(
     const TestBackgroundModeManager& manager) {
   EXPECT_TRUE(chrome::WillKeepAlive());
   EXPECT_TRUE(manager.HaveStatusTray());
   EXPECT_TRUE(manager.IsLaunchOnStartup());
 }
@@ skipping 618 matching lines @@
   // before tearing down the Message Center.
   profile_manager.reset();
 
   // Message Center shutdown must occur after the EndKeepAlive because
   // EndKeepAlive will end up referencing the message center during cleanup.
   message_center::MessageCenter::Shutdown();
 
   // Clear the shutdown flag to isolate the remaining effect of this test.
   browser_shutdown::SetTryingToQuit(false);
 }