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/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index de0640e..7162b7b 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -658,8 +658,8 @@
 
 void SampleWindow::setZoomCenter(float x, float y)
 {
-    fZoomCenterX = SkFloatToScalar(x);
-    fZoomCenterY = SkFloatToScalar(y);
+    fZoomCenterX = x;
+    fZoomCenterY = y;
 }
 
 bool SampleWindow::zoomIn()
@@ -1549,7 +1549,7 @@
 }
 
 void SampleWindow::changeZoomLevel(float delta) {
-    fZoomLevel += SkFloatToScalar(delta);
+    fZoomLevel += delta;
     if (fZoomLevel > 0) {
         fZoomLevel = SkMinScalar(fZoomLevel, MAX_ZOOM_LEVEL);
         fZoomScale = fZoomLevel + SK_Scalar1;