Properly handle extracted bitmaps in cross process/shared addr space SkGPipe.

Use the pixel ref which we have already copied and the appropriate pixel ref
offset.

Turn SampleDrawBitmap into a GM to test this functionality.

Review URL: https://codereview.appspot.com/6348059

git-svn-id: http://skia.googlecode.com/svn/trunk@4417 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed