Fixes BrowserViewHostedAppTest.Layout when using MD

ui/base/resource/material_design/material_design_controller.cc

 // Copyright 2015 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 <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "ui/base/resource/material_design/material_design_controller.h"
 #include "ui/base/ui_base_switches.h"
@@ skipping 25 matching lines @@
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kTopChromeMD);
 
   if (switch_value == switches::kTopChromeMDMaterial) {
     SetMode(Mode::MATERIAL_NORMAL);
   } else if (switch_value == switches::kTopChromeMDMaterialHybrid) {
     SetMode(Mode::MATERIAL_HYBRID);
   } else if (switch_value == switches::kTopChromeMDNonMaterial) {
     SetMode(Mode::NON_MATERIAL);
   } else {
-    LOG(ERROR) << "Invalid value='" << switch_value
-               << "' for command line switch '" << switches::kTopChromeMD
-               << "'.";
-    SetMode(Mode::NON_MATERIAL);
+    SetMode(Mode::MATERIAL_NORMAL);
   }
 #endif  // !defined(ENABLE_TOPCHROME_MD)
 }
 
 void MaterialDesignController::UninitializeMode() {
   MaterialDesignController::SetMode(
       MaterialDesignController::Mode::NON_MATERIAL);
   is_mode_initialized_ = false;
 }
 
 void MaterialDesignController::SetMode(MaterialDesignController::Mode mode) {
   mode_ = mode;
   is_mode_initialized_ = true;
 }
 
 }  // namespace ui