[Pepper GL] Use shared state to fix a memory leak in MapSub GL extension.

ppapi/proxy/resource_creation_proxy.cc

Index: ppapi/proxy/resource_creation_proxy.cc
diff --git a/ppapi/proxy/resource_creation_proxy.cc b/ppapi/proxy/resource_creation_proxy.cc
index 8b65dbd30ccb5c08e6a190022cb9bdeb497f22e5..5f014bff4a9e6725584780571b84b4d69c575fad 100644
--- a/ppapi/proxy/resource_creation_proxy.cc
+++ b/ppapi/proxy/resource_creation_proxy.cc
@@ -252,7 +252,8 @@ PP_Resource ResourceCreationProxy::CreateGraphics3D(
 PP_Resource ResourceCreationProxy::CreateGraphics3DRaw(
     PP_Instance instance,
     PP_Resource share_context,
-    const int32_t* attrib_list) {
+    const int32_t* attrib_list,
+    base::SharedMemoryHandle* shared_state) {
   // Not proxied. The raw creation function is used only in the implementation
   // of the proxy on the host side.
   return 0;