Enable extensions by default.

chrome/browser/extensions/extension_uitest.cc

 // Copyright (c) 2009 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/command_line.h"
 #include "base/gfx/rect.h"
 #include "base/json_reader.h"
 #include "base/json_writer.h"
 #include "base/values.h"
 #include "chrome/browser/automation/extension_automation_constants.h"
@@ skipping 19 matching lines @@
 // startup, manifest parsing, and the actual process model in the
 // equation.  This would also let you write UITests that test individual
 // Chrome Extensions as running in Chrome.  Takes over implementation of
 // extension API calls so that behavior can be tested deterministically
 // through code, instead of having to contort the browser into a state
 // suitable for testing.
 template <class ParentTestType>
 class ExtensionUITest : public ParentTestType {
  public:
   explicit ExtensionUITest(const std::string& extension_path) {
-    launch_arguments_.AppendSwitch(switches::kEnableExtensions);
-
     FilePath filename(test_data_directory_);
     filename = filename.AppendASCII(extension_path);
     launch_arguments_.AppendSwitchWithValue(switches::kLoadExtension,
                                             filename.value());
   }
 
   void SetUp() {
     ParentTestType::SetUp();
     automation()->SetEnableExtensionAutomation(true);
   }
@@ skipping 445 matching lines @@
             proxy->event_count_.size());
   for (std::map<std::string, int>::iterator i = proxy->event_count_.begin();
       i != proxy->event_count_.end(); ++i) {
     const std::pair<std::string, int>& value = *i;
     ASSERT_EQ(1, value.second);
   }
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace