Fixes for drawing through an SkGPipe.

Implement SkGPipeCanvas::drawBitmap.

Fix a bug where needOpBytes did not necessarily provide as
many bytes as requested.

Fix a bug where needOpBytes would wipe old data without
calling notify.

Register SkEmbossMaskFilter so it can be flattened.

Override drawBitmapNine (currently unimplemented) so an
SkGPipeCanvas does not call its base class' method (which
would fail).
Review URL: https://codereview.appspot.com/6071045

git-svn-id: http://skia.googlecode.com/svn/trunk@3741 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed