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/SampleRegion.cpp b/samplecode/SampleRegion.cpp
index 886eb96..7e3e0d2 100644
--- a/samplecode/SampleRegion.cpp
+++ b/samplecode/SampleRegion.cpp
@@ -396,7 +396,8 @@
 
     virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y,
                                               unsigned modi) SK_OVERRIDE {
-        return fRect.contains(SkScalarRound(x), SkScalarRound(y)) ? new Click(this) : NULL;
+        return fRect.contains(SkScalarRoundToInt(x),
+                              SkScalarRoundToInt(y)) ? new Click(this) : NULL;
     }
 
     virtual bool onClick(Click* click) {