Added WARN_UNUSED_RESULT to ScopedTempDir methods.

chrome/test/automation/proxy_launcher.cc

 // Copyright (c) 2010 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/automation/proxy_launcher.h"
 
 #include "app/sql/connection.h"
 #include "base/file_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
@@ skipping 143 matching lines @@
   if (!in_process_renderer_)
     AssertAppNotRunning(
         StringPrintf(L"Unable to quit all browser processes. Original PID %d",
                      &process_id_));
 
   automation_proxy_.reset();  // Shut down IPC testing interface.
 }
 
 void ProxyLauncher::LaunchBrowser(const LaunchState& state) {
   if (state.clear_profile || !temp_profile_dir_.IsValid()) {
-    temp_profile_dir_.Delete();
+    if (temp_profile_dir_.IsValid())
+      ASSERT_TRUE(temp_profile_dir_.Delete());
     ASSERT_TRUE(temp_profile_dir_.CreateUniqueTempDir());
 
     ASSERT_TRUE(test_launcher_utils::OverrideUserDataDir(user_data_dir()));
   }
 
   if (!state.template_user_data.empty()) {
     // Recursively copy the template directory to the user_data_dir.
     ASSERT_TRUE(file_util::CopyRecursiveDirNoCache(
         state.template_user_data,
         user_data_dir()));
@@ skipping 360 matching lines @@
 }
 
 void AnonymousProxyLauncher::InitializeConnection(const LaunchState& state,
                                                   bool wait_for_initial_loads) {
   LaunchBrowserAndServer(state, wait_for_initial_loads);
 }
 
 std::string AnonymousProxyLauncher::PrefixedChannelID() const {
   return channel_id_;
 }