EDK: Add handle rights checking to the various entrypoints.

mojo/edk/system/platform_handle_dispatcher.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 "mojo/edk/system/platform_handle_dispatcher.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 22 matching lines @@
   MutexLocker locker(&mutex());
   return platform_handle_.Pass();
 }
 
 Dispatcher::Type PlatformHandleDispatcher::GetType() const {
   return Type::PLATFORM_HANDLE;
 }
 
 bool PlatformHandleDispatcher::SupportsEntrypointClass(
     EntrypointClass entrypoint_class) const {
-  return false;
+  return (entrypoint_class == EntrypointClass::NONE);
 }
 
 // static
 RefPtr<PlatformHandleDispatcher> PlatformHandleDispatcher::Deserialize(
     Channel* channel,
     const void* source,
     size_t size,
     std::vector<ScopedPlatformHandle>* platform_handles) {
   if (size != sizeof(SerializedPlatformHandleDispatcher)) {
     LOG(ERROR) << "Invalid serialized platform handle dispatcher (bad size)";
@@ skipping 67 matching lines @@
   } else {
     serialization->platform_handle_index = kInvalidPlatformHandleIndex;
   }
 
   *actual_size = sizeof(SerializedPlatformHandleDispatcher);
   return true;
 }
 
 }  // namespace system
 }  // namespace mojo