remove SkFloatToScalar macro

BUG=
R=reed@google.com, djsollen@google.com

Author: caryclark@google.com

Review URL: https://codereview.chromium.org/85463005

git-svn-id: http://skia.googlecode.com/svn/trunk@12385 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/perlinnoise.cpp b/gm/perlinnoise.cpp
index 098c690..164c021 100644
--- a/gm/perlinnoise.cpp
+++ b/gm/perlinnoise.cpp
@@ -72,7 +72,7 @@
         test(canvas, 100, 300, SkPerlinNoiseShader::kFractalNoise_Type,
              0.1f, 0.1f, 3, 4, false);
 
-        canvas->scale(SkFloatToScalar(0.75f), SkFloatToScalar(1.0f));
+        canvas->scale(0.75f, 1.0f);
 
         test(canvas,   0, 400, SkPerlinNoiseShader::kFractalNoise_Type,
              0.1f, 0.1f, 2, 0, false);