Add serialization of SkBitmapSource's new filterQuality member variable

Add serialization of SkBitmapSource's new filterQuality member variable

Missed this in https://codereview.chromium.org/1072603002/ (Add GM to repro crbug.com/472795)

Committed: https://skia.googlesource.com/skia/+/25c40d25d75c8ee5d9632608ba09eb2c5fb765d2

[robertphillips, 2015-04-10 14:35:17]

robertphillips@google.com changed reviewers:
+ jvanverth@google.com

[robertphillips, 2015-04-10 14:35:55]

robertphillips@google.com changed reviewers:
+ reed@google.com
- jvanverth@google.com

[reed1, 2015-04-10 15:15:00]

lgtm

[robertphillips, 2015-04-10 15:32:26]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2015-04-10 15:32:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1078113002/20001

[commit-bot: I haz the power, 2015-04-10 15:40:04]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/25c40d25d75c8ee5d9632608ba09eb2c5fb765d2

[mtklein, 2015-04-10 16:44:55]

mtklein@google.com changed reviewers:
+ mtklein@google.com

[mtklein, 2015-04-10 16:44:55]

https://codereview.chromium.org/1078113002/diff/20001/src/core/SkReadBuffer.h
File src/core/SkReadBuffer.h (right):

https://codereview.chromium.org/1078113002/diff/20001/src/core/SkReadBuffer.h...
src/core/SkReadBuffer.h:59: kBitmapourceFilterQuality_Version  = 41
(pelling)