GPUProcessor uses O3D command buffer service to render to a window....

o3d/gpu_plugin/system_services/shared_memory.h

 // Copyright (c) 2006-2008 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 O3D_GPU_PLUGIN_SYSTEM_SERVICES_SHARED_MEMORY_H_
 #define O3D_GPU_PLUGIN_SYSTEM_SERVICES_SHARED_MEMORY_H_
 
 #include "base/shared_memory.h"
 #include "o3d/gpu_plugin/np_utils/default_np_object.h"
 #include "o3d/gpu_plugin/np_utils/np_dispatcher.h"
@@ skipping 19 matching lines @@
   virtual int32 GetSize() {
     return size;
   }
 
   virtual bool Map();
 
   // This is a temporary function to allow me to drive the command buffer from
   // JavaScript for the purposes of testing.
   bool SetInt32(int32 offset, int32 value);
 
+  // This is a temporary function to allow me to drive the command buffer from
+  // JavaScript for the purposes of testing.
+  bool SetFloat(int32 offset, float value);
+
   base::SharedMemory* shared_memory() const {
     return shared_memory_;
   }
 
   NP_UTILS_BEGIN_DISPATCHER_CHAIN(SharedMemory, DefaultNPObject<NPObject>)
-    NP_UTILS_DISPATCHER(Initialize, bool(int32));
+    NP_UTILS_DISPATCHER(Initialize, bool(int32 size));
     NP_UTILS_DISPATCHER(GetSize, int32())
     NP_UTILS_DISPATCHER(Map, bool())
-    NP_UTILS_DISPATCHER(SetInt32, bool(int32, int32));
+    NP_UTILS_DISPATCHER(SetInt32, bool(int32 offset, int32 value));
+    NP_UTILS_DISPATCHER(SetFloat, bool(int32 offset, float value));
   NP_UTILS_END_DISPATCHER_CHAIN
 
  private:
   NPP npp_;
   base::SharedMemory* shared_memory_;
   DISALLOW_COPY_AND_ASSIGN(SharedMemory);
 };
 
 }  // namespace gpu_plugin
 }  // namespace o3d
 
 #endif  // O3D_GPU_PLUGIN_SYSTEM_SERVICES_SHARED_MEMORY_H_