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/SampleFilter2.cpp b/samplecode/SampleFilter2.cpp
index b4314c5..f3ab7f4 100644
--- a/samplecode/SampleFilter2.cpp
+++ b/samplecode/SampleFilter2.cpp
@@ -82,8 +82,8 @@
                 for (int i = 0; i < fBitmapCount; i++) {
                     SkScalar x = (k * fBitmapCount + j) * W;
                     SkScalar y = i * H;
-                    x = SkIntToScalar(SkScalarRound(x));
-                    y = SkIntToScalar(SkScalarRound(y));
+                    x = SkScalarRoundToScalar(x);
+                    y = SkScalarRoundToScalar(y);
                     canvas->drawBitmap(fBitmaps[i], x, y, &paint);
                     if (i == 0) {
                         SkPaint p;