Revert of Update mojo sdk to rev c02a28868825edfa57ab77947b8cb15e741c5598

third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc

Index: third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc
diff --git a/third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc b/third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc
index 681b40686344d6a6ee3433b9210317f84bfa41e6..d33c960c2924d4c0520aea5c6c815a6050ff9c38 100644
--- a/third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc
+++ b/third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.cc
@@ -22,7 +22,7 @@
 }  // namespace
 
 embedder::ScopedPlatformHandle PlatformHandleDispatcher::PassPlatformHandle() {
-  MutexLocker locker(&mutex());
+  base::AutoLock locker(lock());
   return platform_handle_.Pass();
 }
 
@@ -73,13 +73,13 @@
 }
 
 void PlatformHandleDispatcher::CloseImplNoLock() {
-  mutex().AssertHeld();
+  lock().AssertAcquired();
   platform_handle_.reset();
 }
 
 scoped_refptr<Dispatcher>
 PlatformHandleDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock() {
-  mutex().AssertHeld();
+  lock().AssertAcquired();
   return Create(platform_handle_.Pass());
 }