Use SkError for a bitmap that could not be decoded.

When recreating an SkPicture from an SkStream, use the
new error reporting system to report that an SkBitmap
could not be decoded.

Add a test that the parse error is thrown.

Review URL: https://codereview.chromium.org/13892009

git-svn-id: http://skia.googlecode.com/svn/trunk@8866 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed