Removes MessageLoop::TYPE_XXX where possible

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_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 "chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 63 matching lines @@
     ++num_clear_cache_calls_;
   }
 
  private:
   int num_clear_cache_calls_;
 };
 
 class WebRequestRulesRegistryTest : public testing::Test {
  public:
   WebRequestRulesRegistryTest()
-      : message_loop_(base::MessageLoop::TYPE_IO),
-        ui_(content::BrowserThread::UI, &message_loop_),
+      : ui_(content::BrowserThread::UI, &message_loop_),
         io_(content::BrowserThread::IO, &message_loop_) {}
 
   virtual ~WebRequestRulesRegistryTest() {}
 
   virtual void SetUp() OVERRIDE;
 
   virtual void TearDown() OVERRIDE {
     // Make sure that deletion traits of all registries are executed.
     message_loop_.RunUntilIdle();
   }
@@ skipping 120 matching lines @@
     rule->priority.reset(new int(1));
     rule->actions.push_back(linked_ptr<base::Value>(action_dict.DeepCopy()));
     for (std::vector<const std::string*>::const_iterator it =
              attributes.begin();
          it != attributes.end(); ++it)
       rule->conditions.push_back(CreateCondition(**it));
     return rule;
   }
 
  protected:
-  base::MessageLoop message_loop_;
+  base::MessageLoopForIO message_loop_;
   content::TestBrowserThread ui_;
   content::TestBrowserThread io_;
   // Two extensions with host permissions for all URLs and the DWR permission.
   // Installation times will be so that |extension_| is older than
   // |extension2_|.
   scoped_refptr<Extension> extension_;
   scoped_refptr<Extension> extension2_;
   scoped_refptr<InfoMap> extension_info_map_;
 };
 
@@ skipping 567 matching lines @@
 
   // This is a correct match.
   GURL url2("http://foo.com/index.html");
   net::TestURLRequest request2(url2, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data2(&request2, ON_BEFORE_REQUEST);
   deltas = registry->CreateDeltas(NULL, request_data2, false);
   EXPECT_EQ(1u, deltas.size());
 }
 
 }  // namespace extensions