Revert of Remove ability for Release code to call getRefCnt() or getWeakRefCnt().

Revert of Remove ability for Release code to call getRefCnt() or getWeakRefCnt(). (https://codereview.chromium.org/378643003/)

Reason for revert:
External unit tests call getRefCnt().

Original issue's description:
> Remove ability for Release code to call getRefCnt() or getWeakRefCnt().
> 
> These getRefCnt() methods are not thread safe, so Skia code should not
> be calling them.  unique() is fine.
> 
> SkDEBUG code (SkASSERTs) can still call getRefCnt() / getWeakRefCnt().
> 
> This adds tools/RefCntIs.{h,cpp}, which lets tests make their assertions in
> both debug and release modes.
> 
> BUG=skia:2726
> 
> Committed: https://skia.googlesource.com/skia/+/4ae94ffce5ecf1b71cb5e295b68bf4ec9e697443

TBR=senorblanco@chromium.org,reed@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:2726

[mtklein, 2014-07-09 12:58:01]

Created Revert of Remove ability for Release code to call getRefCnt() or
getWeakRefCnt().

[commit-bot: I haz the power, 2014-07-09 12:59:06]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@google.com/380703002/1

[commit-bot: I haz the power, 2014-07-09 12:59:11]

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

[commit-bot: I haz the power, 2014-07-09 12:59:11]

Failed to apply patch for tools/tsan.supp:
While running git apply --index -p1;
  error: patch failed: tools/tsan.supp:31
  error: tools/tsan.supp: patch does not apply

Patch:       tools/tsan.supp
Index: tools/tsan.supp
diff --git a/tools/tsan.supp b/tools/tsan.supp
index
6c2b0909fc0abdc221c6dad153f8e3abf338595d..179adc9b4afd1f4f20d2cc40ad47d9bd48961536
100644
--- a/tools/tsan.supp
+++ b/tools/tsan.supp
@@ -31,6 +31,9 @@
 race:SkPixelRef::callGenIDChangeListeners
 race:SkPixelRef::needsNewGenID
 
+# This calls SkRefCnt::getRefCnt(), which is not thread safe.  skia:2726
+race:SkImageFilter::filterImage
+
 # SkPathRef caches its bounding box the first time it's needed.
 # This will be fixed naturally once we create (from a single thread) a
 # bounding-box hierarchy for SkRecord-based SkPictures; all bounds will come
pre-cached.