Canvas refactoring part 3....

Canvas refactoring part 3.

- Replace Canvas instance users with CanvasSkia users.
- Rename Canvas2 to Canvas.
- Delete Canvas subclass of CanvasSkia.

This has created some ugliness around the fact that people that used SkCanvas methods on Canvas now have to go through AsCanvasSkia first. This is temporary ugliness that will be eradicated as I incrementally build out the new Canvas API.

BUG=none
TEST=none


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=50784

[brettw, 2010-06-24 21:30:53]

LGTM

http://codereview.chromium.org/2825018/diff/47001/48037
File gfx/canvas.h (right):

http://codereview.chromium.org/2825018/diff/47001/48037#newcode173
gfx/canvas.h:173: virtual SkBitmap ExtractBitmap() const = 0;
Probably you want this to be on the software canvas only. I think the way we use
it now you can just move it there and it will work (since we make a CanvasSkia
and then extract the bitmap).

[sky, 2010-06-24 22:01:57]

OK