Pepper: specify the security origin when enumerating media devices.

content/renderer/pepper/renderer_ppapi_host_impl.cc

Index: content/renderer/pepper/renderer_ppapi_host_impl.cc
diff --git a/content/renderer/pepper/renderer_ppapi_host_impl.cc b/content/renderer/pepper/renderer_ppapi_host_impl.cc
index 5c41003d71f79660c32db9369c1605a3d8003665..2b8193ba0ecf06880c564330844ea1c5f7df4f25 100644
--- a/content/renderer/pepper/renderer_ppapi_host_impl.cc
+++ b/content/renderer/pepper/renderer_ppapi_host_impl.cc
@@ -245,6 +245,14 @@ void RendererPpapiHostImpl::CreateBrowserResourceHosts(
   }
 }
 
+GURL RendererPpapiHostImpl::GetDocumentURL(PP_Instance instance) const {
+  PepperPluginInstanceImpl* instance_object = GetAndValidateInstance(instance);
+  if (!instance_object)
+    return GURL();
+
+  return instance_object->container()->element().document().url();
+}
+
 PepperPluginInstanceImpl* RendererPpapiHostImpl::GetAndValidateInstance(
     PP_Instance pp_instance) const {
   PepperPluginInstanceImpl* instance =