Commits on Mar 3, 2016

1. Remove CanvasProxy along with related concepts and complexities …

   The CanvasProxy feature is being removed to make room for a newer
   incarnation known as OffscreenCanvas, which will be added soon.
   Draft Proposal: https://wiki.whatwg.org/wiki/OffscreenCanvas
   There are currently no known implementations of CanvasProxy.
   
   Summary of changes:
   * Remove CanvasProxy and all canvas methods related to CanvasProxy
   * Remove the notion of a CanvasRenderingContext2D being in a proxied
     state.
   * Remove the notion of a CanvasRenderingContext2D being in an indirect
     state.
   * Remove the notion of a "scratch bitmap" from CanvasRenderingContext2D
     and use a single concept of an "output bitmap" everywhere.
   * Remove the notion of a "list of pending user interface actions"
   * Remove the notion canvas context binding, no more standalone
     contexts, no more setContext method on canvas.
   * Remove the commit() method of CanvasRenderingContext2D.
   * Remove the CanvasRenderingContext2D constructor.
   * Remove the notion of concept-canvas-context-bitmap-mode, canvii
     now always behave as what was previous described as "fixed" mode.
   * Rename bitmap modes "direct-2d" and "direct-webgl" to just "2d" and
     "webgl" respectively.
   * The hit region list, alpha flag, and origin-clean flag are now
     internal attributes of CanvasRenderingContext2D, rather than
     attributes of the scratch/output bitmaps.
   * CanvasRenderingContext2D and its sub-interfaces are no longer
     exposed in Workers.

   

   junov committed Mar 3, 2016
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