Remove A8_LCD luminance hack.

Remove A8_LCD luminance hack.

It no longer appears to be necessary, and the powf function is slowing down
Android text rendering.

Committed: https://skia.googlesource.com/skia/+/dc1cf66483e93c2d12d938bc1ce3b8c60cc68da5

[jvanverth1, 2014-06-30 20:02:34]

Moved from https://codereview.chromium.org/348153002/ since a it's completely
different approach. After another perf pass, this does appear to give us a
slight win, and it's cleaner besides.

[bsalomon, 2014-06-30 20:06:34]

I defer to Ben.

[jvanverth1, 2014-07-01 14:02:36]

Ben, can you take a look today, please?

[bungeman-skia, 2014-07-01 16:52:02]

On 2014/07/01 14:02:36, jvanverth1 wrote:
> Ben, can you take a look today, please?

I like it. However, this will change a number of blink layout tests as well. See
https://storage.googleapis.com/chromium-layout-test-archives/win_blink_rel/14...
. I think there are enough of these on the various platforms that we may want to
put this change behind a flag (let's call it 'SK_IGNORE_FASTER_TEXT_FIX') and
stage it in. I'll add the flag to blink right now so that it will roll into
chromium sooner rather than later.

[bungeman-skia, 2014-07-01 17:07:46]

On 2014/07/01 16:52:02, bungeman1 wrote:
> On 2014/07/01 14:02:36, jvanverth1 wrote:
> > Ben, can you take a look today, please?
> 
> I like it. However, this will change a number of blink layout tests as well.
See
>
https://storage.googleapis.com/chromium-layout-test-archives/win_blink_rel/14...
> . I think there are enough of these on the various platforms that we may want
to
> put this change behind a flag (let's call it 'SK_IGNORE_FASTER_TEXT_FIX') and
> stage it in. I'll add the flag to blink right now so that it will roll into
> chromium sooner rather than later.

SK_IGNORE_FASTER_TEXT_FIX has been added to blink with blink r177321.

[jvanverth1, 2014-07-01 17:51:07]

On 2014/07/01 17:07:46, bungeman1 wrote:
> On 2014/07/01 16:52:02, bungeman1 wrote:
> > On 2014/07/01 14:02:36, jvanverth1 wrote:
> > > Ben, can you take a look today, please?
> > 
> > I like it. However, this will change a number of blink layout tests as well.
> See
> >
>
https://storage.googleapis.com/chromium-layout-test-archives/win_blink_rel/14...
> > . I think there are enough of these on the various platforms that we may
want
> to
> > put this change behind a flag (let's call it 'SK_IGNORE_FASTER_TEXT_FIX')
and
> > stage it in. I'll add the flag to blink right now so that it will roll into
> > chromium sooner rather than later.
> 
> SK_IGNORE_FASTER_TEXT_FIX has been added to blink with blink r177321.

And added to this changelist as well.

[bungeman-skia, 2014-07-01 20:24:53]

On 2014/07/01 17:51:07, jvanverth1 wrote:
> On 2014/07/01 17:07:46, bungeman1 wrote:
> > On 2014/07/01 16:52:02, bungeman1 wrote:
> > > On 2014/07/01 14:02:36, jvanverth1 wrote:
> > > > Ben, can you take a look today, please?
> > > 
> > > I like it. However, this will change a number of blink layout tests as
well.
> > See
> > >
> >
>
https://storage.googleapis.com/chromium-layout-test-archives/win_blink_rel/14...
> > > . I think there are enough of these on the various platforms that we may
> want
> > to
> > > put this change behind a flag (let's call it 'SK_IGNORE_FASTER_TEXT_FIX')
> and
> > > stage it in. I'll add the flag to blink right now so that it will roll
into
> > > chromium sooner rather than later.
> > 
> > SK_IGNORE_FASTER_TEXT_FIX has been added to blink with blink r177321.
> 
> And added to this changelist as well.

lgtm

[jvanverth1, 2014-07-01 20:26:16]

The CQ bit was checked by jvanverth@google.com

[commit-bot: I haz the power, 2014-07-01 20:26:29]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/jvanverth@google.com/337603008/40001

[commit-bot: I haz the power, 2014-07-01 20:43:04]

Change committed as dc1cf66483e93c2d12d938bc1ce3b8c60cc68da5