deprecate SkScalarRound (and its ilk), use SkScalarRound[ToInt,ToScalar]. #define SK_SUPPORT_DEPRECATED_SCALARROUND for legacy clients

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/111353003

git-svn-id: http://skia.googlecode.com/svn/trunk@12719 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleLayerMask.cpp b/samplecode/SampleLayerMask.cpp
index 2e70833..33c06d1 100644
--- a/samplecode/SampleLayerMask.cpp
+++ b/samplecode/SampleLayerMask.cpp
@@ -34,8 +34,8 @@
 
         if (true) {
             SkBitmap mask;
-            int w = SkScalarRound(r.width());
-            int h = SkScalarRound(r.height());
+            int w = SkScalarRoundToInt(r.width());
+            int h = SkScalarRoundToInt(r.height());
             mask.setConfig(SkBitmap::kARGB_8888_Config, w, h);
             mask.allocPixels();
             mask.eraseColor(SK_ColorTRANSPARENT);