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diff --git a/net/host_resolver_helper/dyn_lib_loader_decl.h b/net/host_resolver_helper/dyn_lib_loader_decl.h
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+/** ---------------------------------------------------------------------------
+ Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+     * Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+     * Redistributions in binary form must reproduce the above
+       copyright notice, this list of conditions and the following
+       disclaimer in the documentation and/or other materials provided
+       with the distribution.
+     * Neither the name of Code Aurora Forum, Inc. nor the names of its
+       contributors may be used to endorse or promote products derived
+       from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ -----------------------------------------------------------------------------**/
+
+#ifndef __DYN_LIB_LOADER_DECL_H__
+#define __DYN_LIB_LOADER_DECL_H__
+
+//This macro should be placed in module which is exporting the interface
+//first parameter is the interface class, second is the function which returns the interface object
+//EXAMPLE:  DECLARE_DYNAMIC_OBJECT_INTERFACE(Interface,InterfaceImpl::GetInstance)
+#define DECLARE_DYNAMIC_OBJECT_INTERFACE_EX(__interface_class__, __get_instance_method__) \
+    extern "C" void* Get##__interface_class__##Object() \
+     __attribute__ ((visibility ("default"))); \
+    void* Get##__interface_class__##Object() {\
+        __interface_class__* ptr = __get_instance_method__();\
+        return static_cast<void*>(ptr);\
+    } \
+
+//This macro should be placed in module which is exporting the interface
+//first parameter is the interface class, second is the class implemeting the static
+//GetInstance function to get the interface object
+//EXAMPLE:  DECLARE_DYNAMIC_OBJECT_INTERFACE(Interface,InterfaceImpl)
+#define DECLARE_DYNAMIC_OBJECT_INTERFACE(__interface_class__,__impl_class__) \
+    DECLARE_DYNAMIC_OBJECT_INTERFACE_EX(__interface_class__,__impl_class__::GetInstance) \
+
+#endif //__DYN_LIB_LOADER_DECL_H__