Enable MD for Chrome on Windows.

ui/base/material_design/material_design_controller.cc

Index: ui/base/material_design/material_design_controller.cc
diff --git a/ui/base/material_design/material_design_controller.cc b/ui/base/material_design/material_design_controller.cc
index 6718a185e2fb04523a001e2c5a6b6e2cf89e2219..85638fe8f52ad5be5b0751755915bfba2cd6f9bf 100644
--- a/ui/base/material_design/material_design_controller.cc
+++ b/ui/base/material_design/material_design_controller.cc
@@ -108,12 +108,9 @@ MaterialDesignController::Mode MaterialDesignController::DefaultMode() {
     }
   }
 #endif  // defined(USE_OZONE)
-  return MATERIAL_NORMAL;
-#elif defined(OS_LINUX) || defined(OS_MACOSX)
-  return MATERIAL_NORMAL;
-#else
-  return NON_MATERIAL;
 #endif  // defined(OS_CHROMEOS)
+
+  return MATERIAL_NORMAL;
 }
 
 // static