Bug 1098275 - Inlinize block-level boxes inside ruby. r=heycam

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extra : rebase_source : 70a969d3a6be4ea5dfe14777aa7c31189ade7211
extra : source : 30e0ea21cdfaa29f2c138f0b8975da984e8ac009
Bug 1098257 - Add tests for inlinizing block-level boxes inside ruby. r=heycam

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extra : rebase_source : 312702b9a3a6cfacc067001fe4013dbf23b6b52a
extra : source : 02feede82eaf3c822748fc5751f20b21bb0ac514