Remove TopSites::IsEnabled() as well as related dead code.

chrome/browser/history/top_sites_unittest.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 "app/l10n_util.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
@@ skipping 114 matching lines @@
 
 class TopSitesTest : public testing::Test {
  public:
   TopSitesTest()
       : ui_thread_(BrowserThread::UI, &message_loop_),
         db_thread_(BrowserThread::DB, &message_loop_),
         original_command_line_(*CommandLine::ForCurrentProcess()) {
   }
 
   virtual void SetUp() {
-    CommandLine::ForCurrentProcess()->AppendSwitch(switches::kEnableTopSites);
     profile_.reset(new TestingProfile);
     if (CreateHistoryAndTopSites()) {
       profile_->CreateHistoryService(false, false);
       profile_->CreateTopSites();
       profile_->BlockUntilTopSitesLoaded();
     }
   }
 
   virtual void TearDown() {
     profile_.reset();
@@ skipping 1191 matching lines @@
   WaitForTopSites();
   EXPECT_FALSE(IsTopSitesLoaded());
 
   // Load history, which should make TopSites finish loading too.
   profile()->CreateHistoryService(false, false);
   profile()->BlockUntilTopSitesLoaded();
   EXPECT_TRUE(IsTopSitesLoaded());
 }
 
 }  // namespace history