SK_USE_SCALED_FONTMETRICS for correct scaling

SK_USE_SCALED_FONTMETRICS for correct scaling

related blink change:
https://codereview.chromium.org/691133002

Committed: https://skia.googlesource.com/skia/+/c17c6582ec0b7bc211d7de9e8d634692d239c123

[reed1, 2014-10-31 15:00:29]

reed@google.com changed reviewers:
+ bungeman@google.com, mtklein@google.com, reed@google.com

[reed1, 2014-10-31 15:00:31]

1. land this
2. land a guarded fix to blink
3. defined this flag in chrome (expect minimal rebaselines)
4. remove guard from new code in blink
5. remove guard from skia
6. remove (no obsolete) flag from chrome

[reed1, 2014-10-31 15:00:44]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-10-31 15:01:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/692083002/1

[commit-bot: I haz the power, 2014-10-31 15:01:07]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-10-31 21:01 UTC

[bungeman-skia, 2014-10-31 15:18:41]

lgtm, but I think the process should be:

1. Land this CL.
2. Roll this CL into Chromium (simultaneously shows up in Blink).
3. Make needed Blink change and (in the same CL) add the flag from the new code
to public/blink_skia_config.gypi. When this CL lands rebaselines will be needed.

4. Remove the define from Skia (leaving only the new code).
5. Roll that change into Chromium/Blink.
6. Remove define from public/blink_skia_config.gypi.

[commit-bot: I haz the power, 2014-10-31 15:20:50]

Committed patchset #1 (id:1) as c17c6582ec0b7bc211d7de9e8d634692d239c123