Use SkPicture::ExtractBitmap callback in pdf too, there is no need for a specialized function pointer for pdf only only to pass a rectangle, when we can use subseted bitmaps.

R=scroggo@google.com, reed@google.com, vandebo@chromium.org, bsalomon@google.com

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/25054002

git-svn-id: http://skia.googlecode.com/svn/trunk@11591 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed