Enable MSVC warning for unused locals.

chrome/browser/content_settings/host_content_settings_map_unittest.cc

 // Copyright (c) 2012 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/auto_reset.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 899 matching lines @@
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             host_content_settings_map->GetContentSetting(
                 embedder, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
 }
 
 TEST_F(HostContentSettingsMapTest, ShouldAllowAllContent) {
   TestingProfile profile;
   HostContentSettingsMap* host_content_settings_map =
       profile.GetHostContentSettingsMap();
+  ALLOW_UNUSED_LOCAL(host_content_settings_map);  // MSVC is retarded
 
   GURL http_host("http://example.com/");
   GURL https_host("https://example.com/");
   GURL embedder("chrome://foo");
   GURL extension("chrome-extension://foo");
   EXPECT_FALSE(host_content_settings_map->ShouldAllowAllContent(
                    http_host, embedder, CONTENT_SETTINGS_TYPE_NOTIFICATIONS));
   EXPECT_FALSE(host_content_settings_map->ShouldAllowAllContent(
                    http_host, embedder, CONTENT_SETTINGS_TYPE_GEOLOCATION));
   EXPECT_FALSE(host_content_settings_map->ShouldAllowAllContent(
@@ skipping 104 matching lines @@
       CONTENT_SETTINGS_TYPE_IMAGES, true);
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
   host_content_settings_map->SetDefaultContentSetting(
       CONTENT_SETTINGS_TYPE_IMAGES, CONTENT_SETTING_BLOCK);
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             host_content_settings_map->GetContentSetting(
                 host, host, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
 }