cc: Use SkMScalar instead of doubles everywhere in cc

ui/gfx/transform_util.h

Index: ui/gfx/transform_util.h
diff --git a/ui/gfx/transform_util.h b/ui/gfx/transform_util.h
index 19a98a3d436c6f8c2dea22e68d0d5824ce607b59..1b1de09fca3d14f6fd50dc366a30d1a12be2c941 100644
--- a/ui/gfx/transform_util.h
+++ b/ui/gfx/transform_util.h
@@ -22,11 +22,11 @@ struct UI_EXPORT DecomposedTransform {
   // if used with Compose below, will produce the identity transform.
   DecomposedTransform();
 
-  double translate[3];
-  double scale[3];
-  double skew[3];
-  double perspective[4];
-  double quaternion[4];
+  SkMScalar translate[3];
+  SkMScalar scale[3];
+  SkMScalar skew[3];
+  SkMScalar perspective[4];
+  SkMScalar quaternion[4];
 
   // Copy and assign are allowed.
 };