Get rid of all pid references from base::SharedMemoryHandle.

sandbox/win/src/process_mitigations_win32k_dispatcher.cc

Index: sandbox/win/src/process_mitigations_win32k_dispatcher.cc
diff --git a/sandbox/win/src/process_mitigations_win32k_dispatcher.cc b/sandbox/win/src/process_mitigations_win32k_dispatcher.cc
index 347cdf14e730ccb14fc123e1967f147a3f19edd0..426e331a00edee3c04dc5bb33d100ece98e7e14e 100644
--- a/sandbox/win/src/process_mitigations_win32k_dispatcher.cc
+++ b/sandbox/win/src/process_mitigations_win32k_dispatcher.cc
@@ -28,7 +28,7 @@ base::SharedMemoryHandle GetSharedMemoryHandle(const ClientInfo& client_info,
                          &result_handle, 0, FALSE, DUPLICATE_SAME_ACCESS)) {
     result_handle = nullptr;
   }
-  return base::SharedMemoryHandle(result_handle, ::GetCurrentProcessId());
+  return base::SharedMemoryHandle(result_handle);
 }
 
 }  // namespace