Fix scons compile in Native Client on Windows.

ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc	(revision 99677)
+++ ppapi/native_client/src/shared/ppapi_proxy/browser_ppb_graphics_3d_rpc_server.cc	(working copy)
@@ -77,10 +77,10 @@
 }
 
 bool IsGpuBlacklisted() {
-  static const PPB_GpuBlacklist_Private* interface =
+  static const PPB_GpuBlacklist_Private* gpu_black_list_interface =
       static_cast<const PPB_GpuBlacklist_Private*>(
           ppapi_proxy::GetBrowserInterfaceSafe(PPB_GPU_BLACKLIST_INTERFACE));
-  return interface->IsGpuBlacklisted();
+  return gpu_black_list_interface->IsGpuBlacklisted();
 }
 
 }  // namespace