Bug 944900 - Fix content/media/fmp4 compilation on mingw. r=cpearce

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extra : rebase_source : 3e1bd0401c7768b97dc22bddb7c76cc8ba832675
Bug 930833 - Add missing extern "C" for mingw compilation

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extra : rebase_source : 54b23b82b4cab3d4fba31e289c69f03f00ec6f5f
Bug 900248 - Removed extra qualification of IsInTextureHostList.

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extra : rebase_source : 8e0cdc445810aad2f3f4332462df69b07a6eac02