mus: Remove unnecessary const from property TypeConverter templates

components/mus/public/cpp/window_property.h

 // 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.
 
 #ifndef COMPONENTS_MUS_PUBLIC_CPP_WINDOW_PROPERTY_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_PROPERTY_H_
 
 #include <stdint.h>
 
 // This header should be included by code that defines WindowProperties. It
@@ skipping 29 matching lines @@
 //
 // If a property type is not exported, use
 // MUS_DECLARE_WINDOW_PROPERTY_TYPE(MyType) which is a shorthand for
 // MUS_DECLARE_EXPORTED_WINDOW_PROPERTY_TYPE(, MyType).
 
 namespace mus {
 
 template <typename T>
 void Window::SetSharedProperty(const std::string& name, const T& data) {
   const std::vector<uint8_t> bytes =
-      mojo::TypeConverter<const std::vector<uint8_t>, T>::Convert(data);
+      mojo::TypeConverter<std::vector<uint8_t>, T>::Convert(data);
   SetSharedPropertyInternal(name, &bytes);
 }
 
 template <typename T>
 T Window::GetSharedProperty(const std::string& name) const {
   DCHECK(HasSharedProperty(name));
   auto it = properties_.find(name);
-  return mojo::TypeConverter<T, const std::vector<uint8_t>>::Convert(
-      it->second);
+  return mojo::TypeConverter<T, std::vector<uint8_t>>::Convert(it->second);
 }
 
 namespace {
 
 // No single new-style cast works for every conversion to/from int64_t, so we
 // need this helper class. A third specialization is needed for bool because
 // MSVC warning C4800 (forcing value to bool) is not suppressed by an explicit
 // cast (!).
 template <typename T>
 class WindowPropertyCaster {
@@ skipping 81 matching lines @@
   void Deallocator##NAME(int64_t p) {                                   \
     enum { type_must_be_complete = sizeof(TYPE) };                      \
     delete mus::WindowPropertyCaster<TYPE*>::FromInt64(p);              \
   }                                                                     \
   const mus::WindowProperty<TYPE*> NAME##_Value = {DEFAULT, #NAME,      \
                                                    &Deallocator##NAME}; \
   }                                                                     \
   const mus::WindowProperty<TYPE*>* const NAME = &NAME##_Value;
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_PROPERTY_H_