Remove ability to switch to pre-MD UI from about:flags.

chrome/browser/ui/toolbar/toolbar_actions_bar_unittest.cc

 // Copyright 2014 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/ui/toolbar/toolbar_actions_bar_unittest.h"
 
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 166 matching lines @@
       testing::AssertionSuccess() :
       testing::AssertionFailure() << "main bar error:\n" << main_bar_error <<
           "overflow bar error:\n" << overflow_bar_error;
 }
 
 // Note: First argument is optional and intentionally left blank.
 // (it's a prefix for the generated test cases)
 INSTANTIATE_TEST_CASE_P(
     ,
     ToolbarActionsBarUnitTest,
-    testing::Values(ui::MaterialDesignController::NON_MATERIAL,
-                    ui::MaterialDesignController::MATERIAL_NORMAL,
+    testing::Values(ui::MaterialDesignController::MATERIAL_NORMAL,
                     ui::MaterialDesignController::MATERIAL_HYBRID));
 
 TEST_P(ToolbarActionsBarUnitTest, BasicToolbarActionsBarTest) {
   // Add three extensions to the profile; this is the easiest way to have
   // toolbar actions.
   for (int i = 0; i < 3; ++i) {
     CreateAndAddExtension(
         base::StringPrintf("extension %d", i),
         extensions::extension_action_test_util::BROWSER_ACTION);
   }
@@ skipping 370 matching lines @@
       extensions::extension_action_test_util::BROWSER_ACTION);
   toolbar_model()->SetVisibleIconCount(0u);
   {
     base::RunLoop run_loop;
     toolbar_actions_bar()->PopOutAction(action, true, run_loop.QuitClosure());
     run_loop.Run();
   }
   EXPECT_EQ(1u, toolbar_actions_bar()->GetIconCount());
   EXPECT_TRUE(toolbar_actions_bar()->NeedsOverflow());
 }