Fix SkPaint::getTypeface() documentation.

SkPaint::getTypeface() allows the caller to borrow a pointer to its
SkTypeface, it does not affect ownership. The existing documentation would
lead a user to beleive that getTypeface() increments the reference count,
but it does not.

TBR=reed@google.com
Change-Id: Ic1a660b026e3c4295f9f0de28abfde29c3f05524
Reviewed-on: https://skia-review.googlesource.com/137183
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
diff --git a/docs/SkPaint_Reference.bmh b/docs/SkPaint_Reference.bmh
index 9b9d001..99873ee 100644
--- a/docs/SkPaint_Reference.bmh
+++ b/docs/SkPaint_Reference.bmh
@@ -3138,7 +3138,7 @@
 #In Typeface_Methods
 #Line # returns Typeface, font description ##
     Returns Typeface if set, or nullptr.
-    Increments Typeface Reference_Count by one.
+    Does not alter Typeface Reference_Count.
 
     #Return  Typeface if previously set, nullptr otherwise ##
 
diff --git a/include/core/SkPaint.h b/include/core/SkPaint.h
index 39e7abc..3879562 100644
--- a/include/core/SkPaint.h
+++ b/include/core/SkPaint.h
@@ -763,7 +763,7 @@
     void setMaskFilter(sk_sp<SkMaskFilter> maskFilter);
 
     /** Returns SkTypeface if set, or nullptr.
-        Increments SkTypeface SkRefCnt by one.
+        Does not alter SkTypeface SkRefCnt.
 
         @return  SkTypeface if previously set, nullptr otherwise
     */