Validate incoming window properties.

ui/views/mus/mus_client.cc

 // Copyright 2016 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 "ui/views/mus/mus_client.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread.h"
 #include "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
@@ skipping 63 matching lines @@
     base::Thread::Options thread_options(base::MessageLoop::TYPE_IO, 0);
     thread_options.priority = base::ThreadPriority::NORMAL;
     CHECK(io_thread_->StartWithOptions(thread_options));
     io_task_runner = io_thread_->task_runner();
   }
 
   // TODO(msw): Avoid this... use some default value? Allow clients to extend?
   property_converter_ = base::MakeUnique<aura::PropertyConverter>();
   property_converter_->RegisterProperty(
       wm::kShadowElevationKey,
-      ui::mojom::WindowManager::kShadowElevation_Property);
+      ui::mojom::WindowManager::kShadowElevation_Property,
+      base::Bind(&wm::IsValidShadowElevation));
 
   if (create_wm_state)
     wm_state_ = base::MakeUnique<wm::WMState>();
 
   discardable_memory::mojom::DiscardableSharedMemoryManagerPtr manager_ptr;
   connector->BindInterface(ui::mojom::kServiceName, &manager_ptr);
 
   discardable_shared_memory_manager_ = base::MakeUnique<
       discardable_memory::ClientDiscardableSharedMemoryManager>(
       std::move(manager_ptr), io_task_runner);
@@ skipping 199 matching lines @@
       return root->GetTopWindowContainingPoint(relative_point);
   }
   return nullptr;
 }
 
 std::unique_ptr<OSExchangeData::Provider> MusClient::BuildProvider() {
   return base::MakeUnique<aura::OSExchangeDataProviderMus>();
 }
 
 }  // namespace views