Bug 1014686 - [Messages][Refactoring] Improve "html template string" to "dom node\fragment" conversion. Added Template.prepare method. r=djf, julien
Merge pull request #24259 from azasypkin/bug-1014686-template-refactoring

Bug 1014686 - [Messages][Refactoring] Improve "html template string" to "dom node\fragment" conversion. Added Template.prepare method. r=djf, julien