Patch the results of queries that return object IDs in the passthrough cmd decoder.

gpu/command_buffer/service/client_service_map.h

 // Copyright (c) 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CLIENT_SERVICE_MAP_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CLIENT_SERVICE_MAP_H_
 
 #include <limits>
 #include <unordered_map>
 
@@ skipping 36 matching lines @@
   }
 
   ServiceType GetServiceIDOrInvalid(ClientType client_id) {
     ServiceType service_id;
     if (GetServiceID(client_id, &service_id)) {
       return service_id;
     }
     return invalid_service_id();
   }
 
+  bool GetClientID(ServiceType service_id, ClientType* client_id) const {
+    if (service_id == 0) {
+      if (client_id) {
+        *client_id = 0;
+      }
+      return true;
+    }
+    for (auto mapping : client_to_service_) {
+      if (mapping.second == service_id) {
+        if (client_id) {
+          *client_id = mapping.first;
+        }
+        return true;
+      }
+    }
+    return false;
+  }
+
   ServiceType invalid_service_id() const {
     return std::numeric_limits<ServiceType>::max();
   }
 
   typedef typename std::unordered_map<ClientType, ServiceType>::const_iterator
       const_iterator;
   const_iterator begin() const { return client_to_service_.begin(); }
   const_iterator end() const { return client_to_service_.end(); }
 
  private:
   std::unordered_map<ClientType, ServiceType> client_to_service_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CLIENT_SERVICE_MAP_H_