Remove some unneeded uses of wstring.

chrome/test/ui/ui_test.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 "chrome/test/ui/ui_test.h"
 
 #if defined(OS_POSIX)
 #include <signal.h>
 #include <sys/types.h>
 #endif
@@ skipping 99 matching lines @@
 }
 
 UITestBase::~UITestBase() {}
 
 void UITestBase::SetUp() {
   // Tests that do a session restore (e.g. SessionRestoreUITest, StartupTest)
   // call SetUp() multiple times because they restart the browser mid-test.
   // We don't want to reset the ProxyLauncher's state in those cases.
   if (!launcher_.get())
     launcher_.reset(CreateProxyLauncher());
-  launcher_->AssertAppNotRunning(L"Please close any other instances "
-                                 L"of the app before testing.");
+  launcher_->AssertAppNotRunning("Please close any other instances "
+                                 "of the app before testing.");
 
   JavaScriptExecutionController::set_timeout(
       TestTimeouts::action_max_timeout_ms());
   test_start_time_ = Time::NowFromSystemTime();
 
   SetLaunchSwitches();
   launcher_->InitializeConnection(DefaultLaunchState(),
                                   wait_for_initial_loads_);
 }
 
@@ skipping 649 matching lines @@
     base::PlatformThread::Sleep(TestTimeouts::action_timeout_ms() / kCycles);
   }
 
   LOG(INFO) << "Elapsed time: " << (base::Time::Now() - start).InSecondsF()
             << " seconds"
             << " call failed " << fail_count << " times"
             << " state was incorrect " << incorrect_state_count << " times";
   ADD_FAILURE() << "Timeout reached in " << __FUNCTION__;
   return false;
 }