Pass arguments to SkRecords structs by const&.

Pass arguments to SkRecords structs by const&.

This has the effect of using delay_copy() on every argument,
obviating the need for delay_copy() and, crucially, having 
to remember to call delay_copy().

All these constructors are fully inlined, so we'll never pay
a penalty for passing small things by reference... the compiler
can see that and just pass by value.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/c845fa0788a2c7eb4f4a094d7a041edf979099c1

[mtklein_C, 2015-06-30 15:17:18]

mtklein@chromium.org changed reviewers:
+ reed@google.com

[mtklein_C, 2015-06-30 15:17:22]

The CQ bit was checked by mtklein@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-06-30 15:17:43]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1215523004/1

[commit-bot: I haz the power, 2015-06-30 15:24:33]

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

[commit-bot: I haz the power, 2015-06-30 15:24:34]

Dry run: This issue passed the CQ dry run.

[reed1, 2015-06-30 16:36:54]

lgtm

[mtklein, 2015-06-30 16:49:01]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2015-06-30 16:49:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1215523004/1

[commit-bot: I haz the power, 2015-06-30 16:49:52]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/c845fa0788a2c7eb4f4a094d7a041edf979099c1