Use SkPaint::getFontBounds() for text bounding boxes in pictures.

Use SkPaint::getFontBounds() for text bounding boxes in pictures.

Now that SkTextBlobs have landed, this is a perf no-op, but it at least lets us eliminate a bunch of questionable hacks.

CQ_EXTRA_TRYBOTS=client.skia:Test-Win7-ShuttleA-HD2000-x86-Debug-Trybot,Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug-Trybot,Test-Win7-ShuttleA-HD2000-x86-Debug-GDI-Trybot

GDI:
-996.826172 -1508.789063 3000.000000 487.060547 vs. -1007.812500 -1500.000000 3000.000000 492.187500

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/02d2b9831579173e783569530ab7bae08de907e9

COMMIT=false

[mtklein, 2014-12-15 21:51:08]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-12-15 21:51:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/805983003/1

[commit-bot: I haz the power, 2014-12-15 21:51:43]

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 2014-12-16 03:51 UTC

[mtklein, 2014-12-15 23:57:27]

The CQ bit was unchecked by mtklein@google.com

[mtklein, 2014-12-15 23:57:31]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-12-15 23:57:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/805983003/1

[commit-bot: I haz the power, 2014-12-15 23:57:36]

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 2014-12-16 05:57 UTC

[commit-bot: I haz the power, 2014-12-16 05:57:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-16 05:57:45]

No LGTM from a valid reviewer yet. Please ask for an LGTM from a
full Skia committer from
https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

[reed1, 2014-12-16 13:49:27]

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

[reed1, 2014-12-16 13:49:27]

lgtm

[mtklein, 2014-12-16 14:16:53]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-12-16 14:17:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/805983003/1

[commit-bot: I haz the power, 2014-12-16 14:17:58]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/02d2b9831579173e783569530ab7bae08de907e9

[mtklein, 2014-12-16 14:30:11]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/789793004/ by mtklein@google.com.

The reason for reverting is: Test-Win7-ShuttleA-HD2000-x86-Debug-GDI
.

[mtklein, 2014-12-16 16:00:22]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-12-16 16:00:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/805983003/20001

[commit-bot: I haz the power, 2014-12-16 18:13:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-16 18:13:42]

Try jobs failed on following builders:
  Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug-Trybot on client.skia
(http://build.chromium.org/p/client.skia/builders/Test-Mac10.8-MacMini4.1-GeFo...)

[mtklein, 2014-12-16 18:26:36]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-12-16 18:26:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/805983003/20001

[commit-bot: I haz the power, 2014-12-16 20:26:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-16 20:26:25]

Try jobs failed on following builders:
  Test-Mac10.8-MacMini4.1-GeForce320M-x86_64-Debug-Trybot on client.skia
(http://build.chromium.org/p/client.skia/builders/Test-Mac10.8-MacMini4.1-GeFo...)