Bug 973264 - If we wrap gfxImageSurface data when creating a SourceSurface, hold a reference to the original surface so the data stays alive. r=Bas

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extra : rebase_source : ef99e74688f992c80bd4da1cd5373dcd95ac80a3
Bug 988771 - Remove DeprecatedCanvasClient. r=nical

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extra : rebase_source : 3dbca3237e08a6ab18e2d5805cacf18659a40d69