Make image scaling have floating point scales.  Third attempt to land this
due to some struggles with the CQ.  Original CL here:

https://codereview.chromium.org/298243003/

BUG=
R=bsalomon@google.com, epoger@google.com
TBR=bsalomon, epoger

Author: humper@google.com

Review URL: https://codereview.chromium.org/300113008

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@14920 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gmslides.gypi b/gmslides.gypi
index 1ebba69..15c7243 100644
--- a/gmslides.gypi
+++ b/gmslides.gypi
@@ -76,6 +76,7 @@
     '../gm/filltypes.cpp',
     '../gm/filltypespersp.cpp',
     '../gm/filterbitmap.cpp',
+    '../gm/filterindiabox.cpp',
     '../gm/fontcache.cpp',
     '../gm/fontmgr.cpp',
     '../gm/fontscaler.cpp',