Return the empty string as appropriate for location.{search,hash}.
Improve error message for when web fonts fail to load.
Merge pull request #3083 from glennw/font-cache-error

Improve error message for when web fonts fail to load.
Merge pull request #3081 from Ms2ger/location-empty

Return the empty string as appropriate for location.{search,hash}; r=Manishearth
node.textContent and node.nodeValue should not throw
Merge pull request #3087 from Manishearth/node-textcontent-throws

node.textContent and node.nodeValue should not throw; r=Ms2ger
Structured clone the argument to Worker.postMessage.
Structured clone the argument to DedicatedWorkerGlobalScope.postMessage.