Clean up usage of SkSurfaceProps

This CL continues cleaning up Skia's usage of SkSurfaceProps. It:

  Removes the duplicate SkSurfaceProps object from SkImageFilter::Proxy.

  Removes a dispreferred ctor from SkCanvas

  Removes the initForRootLayer entry point from SkDevice (since the root device and the canvas should always have the same pixel geometry now).

Review URL: https://codereview.chromium.org/1201983006
12 files changed