Observe surface LCD settings in SkBaseDevice::drawTextBlob()

Observe surface LCD settings in SkBaseDevice::drawTextBlob()

We're currently overwriting the paint LCD text flag based on the the run
font data => this cancels any LCD filtering we might have performed
higher up the stack.


BUG=423362
R=reed@google.com

Committed: https://skia.googlesource.com/skia/+/112e7e277702e104357f2d44742253ee1b0109ac

[f(malita), 2014-11-12 19:18:00]

Updated to use SkDevice::filterTextFlags() instead (still need to update
filterTextFlags to handle surface props and saveLayers properly). PTAL.

[f(malita), 2014-11-13 21:25:03]

Updated after today's LCD changes, PTAL.

PS#4 is the minimal fix, with some LCD logic duplication, while PS#5
encapsulates all that in a resurrected filterTextFlags().

[f(malita), 2014-11-13 21:47:18]

+ API comment

[reed1, 2014-11-13 21:47:36]

lgtm w/ comment request

https://codereview.chromium.org/718913003/diff/80001/include/core/SkDevice.h
File include/core/SkDevice.h (right):

https://codereview.chromium.org/718913003/diff/80001/include/core/SkDevice.h#...
include/core/SkDevice.h:131: uint32_t filterTextFlags(const SkPaint&) const;
// Returns the text-related flags, possibly modified based on the state of the
device (e.g. support for LCD)

[f(malita), 2014-11-13 21:51:35]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2014-11-13 21:52:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/718913003/120001

[commit-bot: I haz the power, 2014-11-13 22:06:02]

Committed patchset #7 (id:120001) as
https://skia.googlesource.com/skia/+/112e7e277702e104357f2d44742253ee1b0109ac