ports for mac, ios, android, linux, windows

R=djsollen@google.com

Review URL: https://codereview.chromium.org/19787006

git-svn-id: http://skia.googlecode.com/svn/trunk@10239 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/skpdiff/SkDiffContext.cpp b/experimental/skpdiff/SkDiffContext.cpp
index 5198703..a75450b 100644
--- a/experimental/skpdiff/SkDiffContext.cpp
+++ b/experimental/skpdiff/SkDiffContext.cpp
@@ -181,7 +181,7 @@
                     stream.writeText("\",\n");
 
                     stream.writeText("                    \"result\": ");
-                    stream.writeScalarAsText(data.fResult);
+                    stream.writeScalarAsText((SkScalar)data.fResult);
                     stream.writeText(",\n");
 
                     stream.writeText("                    \"pointsOfInterest\": [\n");