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/SampleText.cpp b/samplecode/SampleText.cpp
index aa314dd..c881961 100644
--- a/samplecode/SampleText.cpp
+++ b/samplecode/SampleText.cpp
@@ -176,7 +176,7 @@
      //   printf(" %d %g", i, x);
         x = powf(x, ee);
      //   printf(" %g", x);
-        int xx = SkScalarRound(x * 255);
+        int xx = SkScalarRoundToInt(x * 255);
      //   printf(" %d\n", xx);
         fTable[i] = SkToU8(xx);
     }