Refactored the bitmap creation into PictureRenderer.

Further, the picture is also stored in the PictureRenderer.

The main gain of all of this is that we will not have to change how the device in more than one place when we end up adding different devices.

Review URL: https://codereview.appspot.com/6458074

git-svn-id: http://skia.googlecode.com/svn/trunk@4990 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed